Have a look at this recent thread which gives some advice into the process -
http://archicad-talk.graphisoft.com/viewtopic.php?p=137720
There are more threads about this in the 'Schedules' section of the forum, so do some searching there for more info.
This thread belongs in that section too, so perhaps a moderator could move this thread for you and you may get more responses.
Best of luck!