rampancy: ...
a) CrossOver 11.x - the latest version of CrossOver is built on the Wine 1.4 codebase; among the most egregious errors that they've fixed is the bug which prevents PS:T from running on computers running on millions of colours (32-bit depth, as karma_police mentioned). With that bug fixed, the game runs out of the box.
The problem is that it doesn't seem to play very well with the command-line install programs used with WeiDU to install mods like the widescreen mod and the various fix/tweak packages out there...so, AFAIK, you'd be limited to a vanilla install.
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Did you manage to play it with no issues at all? I've reinstalled on a clean bottle, but when I start it I just get a garbled screen (squares/rectangles of whatever is behind the game randomly positioned on the screen), and a faded strip of the game moving from the bottom up (which allowed me to cleanly exit the game). This happens before and after installing the widescreen mod. wine windowed mode seems to work ok.
It does not complain about bit depth, so that's an improvement. I guess I'll just have to figure out what is messing everything up.
As for the command line mods, there's a workaround for it. After you install the mod, the command execution window will stick around. This is because it spawned the command line part of the mod, and crossover isn't showing it. You can just close it.
On a new command execution window, write "wineconsole cmd" (no quotes). This will open a command line window, in which you can navigate to the game folder and after that you can just run the mod (dir *.exe inside the game folder will show you all the installed mods executables).