Wow, great

That's one thing I was waiting for. TB now really seems to work with FSX.
Only thing is: I had to change the fsx.cfg manually. FSX sees the two outputs of my nVidia 7800 as two cards, xxx.0 and xxx.1 and refuses to set a resolution of 800x600 for the second one in the setup. This ends up in an error message of my TS ("unreachable"). But once I changed it manually TB works.
Thanks a lot for this great finding.
Now we only need someone with the right skills (that is not me

) to make a great profile.