Some of us are having problems installing P&G with our version of GTR2, as P&G requires GTR2 1.1 . Some of our install disks cannot be upgraded to 1.1 as it is only for the American version as the 1.1 version will not start with our installs. Here's what I did.

1)Install and update GTR2 to 1.1
2)Install P&G
3)Uninstall GTR2 and then reinstall
4)Copy your new (1.0 version) of GTR2.exe and replace that in your P&G installation.

Downside is you won't have 1.1, but you didn't have it anyway probably. I was just thinking that you may be able to copy your 1.0 GTR exe then install 1.1 and then replace you 1.1 exe with the 1.0, but I haven't tried that.