Mark,
You should consider starting over building the model because:
- you now have experienced archicad staff
- you have an office template
- archicad has changed considerably since 2006
Even if you go with updating the old model, you will have to change out all the library parts to new ones, and legacy issues will come up from time to time costing you time and money.
A new model will also be built with your staff aware of what is not currently to code etc.
HTH
Erika
Architect, Consultant
MacBook Pro Retina, 15-inch Yosemite 2.8 GHz Intel Core i7 16 GB 1600 MHz DDR3
Mac OSX 10.11.1
AC5-18
Onuma System
"Implementing Successful Building Information Modeling"