Richard - I have loaded the Ultimate Bundle on one XP Pro machine, and 2 different Win7 Home Premium machines. Take note that the Garritan Personal Orchestra portion of the installation went into a non-reponsive hang mode on all 3 installs. It's when the .nkx (I think that's the file extension) is being copied. Wait quite awhile to ensure it has copied over, then kill the installer. Uncheck that item and re-run the installer from disk 1 and it will then soldier through the rest. GPO is in fact installed, there is just some bug that doesn't recognize the fact.

Or avoid the issue altogether at first and uncheck GPO. Do that one last all by itself.

Enjoy...

-Scott