Well, you can try this:
1. Download PSXMemTool (link in my sig)
2. Open up your NTSC save in memory card slot 1.
3. Open a known working PAL save in memory card slot 2.
4. Go to slot 2 and double click the GT2 save.
5. Copy down the Product Code and Identifier.
6. Go back to slot 1 and double click the GT2 save.
7. Paste the Product Code and Identifier from slot 2 in.
8. Change the Country Code to Europe.
9. Save your memory card in slot 1 as a new file.
10. Set this file in your emulator and try it.
Let me know how you get on. You can email me if you get any problems (
smallion@ngemu.com ). I have GT2 at home so I will test this at home too.