|The 15 pin D-sub abalouge connection wont be a problem as that is normal for a CRT monitor and will work just as well with an TFT monitor with the same input.|
The resolution might be a problem. The TNT2 M64 supports a resolution of up to 1920 x 1200 @75Hz. If it does 1366 x 768 as well than your home and dry. Check the reolutions possible with the video card and if they match then fine.
Even if they dont then it will still work but wont look as good than as if you run the TFT monitor at its native resolution.