Update
I wish to thank all for your input. We or(HP USA Anonymous Person Deserves Credit
) have fixed the problem.
I sent another tech support ticket to Hp This time via USA Site this was the reply
Hello Martin,
Thank you for contacting HP's Customer Support Center. We received your email regarding having drawings print long-edge first on the HP Designjet 500, using the raster driver for Mac OS X.
The HP Designjet 500 raster driver for Mac OS X does not have a rotate option. As a result, all drawings print short-edge first if you select a paper size that is provided by the driver. To get around this limitation, create a custom paper size wider than tall. Be aware that the orientation setting in page setup will behave opposite than expected.
For example, say the HP Designjet 500 has a 36" roll of paper loaded. To conserve media, you wish to print an ARCH D-sized drawing (36"wide by 24"tall) long-edge first. Since the printer driver does not have a rotate option, create a custom paper size measuring 35.6"wide by 22.67" tall, with all margins set to 0". In Page Setup under Page Attributes, select the custom paper size you created, set orientation to portrait for a drawing in landscape orientation (and vice versa), and set printer to Any Printer.
Note: The HP Designjet 500 applies its hardware margins to the outside of the paper size selected in Page Setup. The printer's hardware margins are 0.67" (or 17 mm) for leading and trailing margins, and are 0.2" (5 mm). When exact dimensions of a paper size are important, subtract the printer's hardware margins from the desired dimensions to arrive at the custom paper size dimensions.
When you print to the HP Designjet 500, using the HP Designjet 500 raster driver for Mac OS X, the Macintosh does all of the processing and the HPGL/2 card is bypassed. Other companies may distribute an HPGL/2 RIP which would utilize that card.
Once again, thank you for contacting HP's Commercial Solutions Center.
Not Quite
First I had to Uninstall the print drivers
Then Update The Printer BIOS/Firmware to latest version for a second time reinstall the drivers & setup the Custom pages as per above
Still NO GO
After 3 reboots All started to Work Correctly For some Unknown Reason & all Prints as it should with no additional $$$cash outlay,
Despite HP Aust Advice
So off to work Finally
In my Hunt for Drivers Last night i found this place (ESP Print Pro
http://www.easysw.com/printpro/ )Which installed & worked. Looks like they could help with a lot of printing problems But this requires $$
Thanks Again
Martin
I wish to thank all for your input. We or(HP USA Anonymous Person Deserves Credit
) have fixed the problem. I sent another tech support ticket to Hp This time via USA Site this was the reply
Hello Martin,
Thank you for contacting HP's Customer Support Center. We received your email regarding having drawings print long-edge first on the HP Designjet 500, using the raster driver for Mac OS X.
The HP Designjet 500 raster driver for Mac OS X does not have a rotate option. As a result, all drawings print short-edge first if you select a paper size that is provided by the driver. To get around this limitation, create a custom paper size wider than tall. Be aware that the orientation setting in page setup will behave opposite than expected.
For example, say the HP Designjet 500 has a 36" roll of paper loaded. To conserve media, you wish to print an ARCH D-sized drawing (36"wide by 24"tall) long-edge first. Since the printer driver does not have a rotate option, create a custom paper size measuring 35.6"wide by 22.67" tall, with all margins set to 0". In Page Setup under Page Attributes, select the custom paper size you created, set orientation to portrait for a drawing in landscape orientation (and vice versa), and set printer to Any Printer.
Note: The HP Designjet 500 applies its hardware margins to the outside of the paper size selected in Page Setup. The printer's hardware margins are 0.67" (or 17 mm) for leading and trailing margins, and are 0.2" (5 mm). When exact dimensions of a paper size are important, subtract the printer's hardware margins from the desired dimensions to arrive at the custom paper size dimensions.
When you print to the HP Designjet 500, using the HP Designjet 500 raster driver for Mac OS X, the Macintosh does all of the processing and the HPGL/2 card is bypassed. Other companies may distribute an HPGL/2 RIP which would utilize that card.
Once again, thank you for contacting HP's Commercial Solutions Center.
Not Quite
First I had to Uninstall the print drivers
Then Update The Printer BIOS/Firmware to latest version for a second time reinstall the drivers & setup the Custom pages as per above
Still NO GO
After 3 reboots All started to Work Correctly For some Unknown Reason & all Prints as it should with no additional $$$cash outlay,
Despite HP Aust Advice
So off to work Finally
In my Hunt for Drivers Last night i found this place (ESP Print Pro
http://www.easysw.com/printpro/ )Which installed & worked. Looks like they could help with a lot of printing problems But this requires $$
Thanks Again
Martin
Can I chime in here? I have now made my move all my boxes are unpacked and I really like the new digs. 
The G5 is a splended machine, with it I am using my dual 17" SyncMasters 172n's - VGA Flatscreens, the HP's (printers plotters) are on the network. I moved all of my existing data over to an external Firewire/USB drive now I just mount it from my Mac.
Web, (Safari), email (Mail), iLife applications (don't underestimate the power of these apps), AC r9, C4D r9, PhotoShop, Quark, MS Word they all work great and exchange data beween each other seemlessly. AC 9 is butter smooth OpenGL performance and the vector zooms and pans are snappier. Panther is a great implementation of the OSX, but Tiger will be even better.
I have been a windows user since AC 6.0 , at the same time I have had a Mac. Now that I am on just the Mac I have never felt more productive. Now my goal is to template, shortcut and script as much daily grind work as I possibly can. The only way to make money in architecture is when you can cut through a work load in half the time. Your project bid fees need to remain competitive but your method of getting the work out remains the only place where you can cheat. My way of cheating is to use a G5 Dual 2GHz Mac.
The G5 is a splended machine, with it I am using my dual 17" SyncMasters 172n's - VGA Flatscreens, the HP's (printers plotters) are on the network. I moved all of my existing data over to an external Firewire/USB drive now I just mount it from my Mac.
Web, (Safari), email (Mail), iLife applications (don't underestimate the power of these apps), AC r9, C4D r9, PhotoShop, Quark, MS Word they all work great and exchange data beween each other seemlessly. AC 9 is butter smooth OpenGL performance and the vector zooms and pans are snappier. Panther is a great implementation of the OSX, but Tiger will be even better.
I have been a windows user since AC 6.0 , at the same time I have had a Mac. Now that I am on just the Mac I have never felt more productive. Now my goal is to template, shortcut and script as much daily grind work as I possibly can. The only way to make money in architecture is when you can cut through a work load in half the time. Your project bid fees need to remain competitive but your method of getting the work out remains the only place where you can cheat. My way of cheating is to use a G5 Dual 2GHz Mac.
Still looking?
