After reading a lot of threads and trying out different things, TDS still doesn't run on my new system.
(Samsung R560 Mebugo: Intel Core 2 Duo P7350, Geforce 9600GT Mobile, Vista Home Edition 32 Bit)

I'm running the admin account, disabled UAC, set the compatibility of all T3 related .exe's to WinXP+SP2. It is a clean install of TDS, only patch 1.1 applied, no wiedescreen or other tweaks installed. The GPU driver is the 176.68 version for nVidia mobile GPU's (T1, T2 & Dromed running fine). I removed all virtual devices and drives.

As soon as I start the T3.exe, the error message
"Runtime Error. Abnormal program termination." shows up and that's it. In addition, the mouse cursor turns into that "rotating CD" like when inserting a CD or DVD and windows "scans" its content.

Thanks in advance,
intruder