I did like you told me and... IT WORKS!!!
You are my hero! That was really easy but I didnīt know.
So I took my burned cd and put the files from Udata to the same folder on my E drive.
Do you know, what the "gameid.ini" is for? I didnīt copy it but there was no problem. And the Tdata folder seems not to be used. It has the same subfolders like the Udata folder, but most of them are empty.
Thank you, Iīm really happy it is working