HTC Star Trek - Windows Mobile 6.0 Standard ROM

There are different WM6 ROMs available for different versions of the HTC Star Trek, including the Qtek 8500, i-mate Smartflip, and Cingular 3125. Hit up xda and download the ROM that works for you.
More information about Windows Mobile 6.0 ROM for HTC Star Trek and variants is available from xda-developers forum here.