JABB and GPO don't have a full set of General MIDI instruments.
Here are a few things unique to using the plugin with Band-in-a-Box ®.
We also have an older archived tutorial which describes earlier versions of the products. The Garritan manuals and website have full details on installation and use this tutorial is only intended as a general guide, with some troubleshooting tips and tricks related to PG Music products. For Band-in-a-Box ®, you can use the same information, but there are a few differences. This tutorial describes RealBand, but it is also entirely applicable to PowerTracks Pro Audio. On the other hand, in RealBand (or PowerTracks) you can select a synth for each track individually. The main reason for this is that GPO and JABB don't have a full set of General MIDI instruments, and in Band-in-a-Box ® you can only use one synth for all your tracks. They are most suited for use in either PowerTracks or RealBand (particularly GPO). You can use 'Garritan Personal Orchestra' and 'Garritan Jazz & Big Band' with Band-in-a-Box ® for Windows, RealBand, and PowerTracks Pro Audio. Using Garritan Personal Orchestra and Jazz & Big Band with PG Music products
