what i got here:
linux => winex (fake windows) => steam (working, other mods working) => install beta3 => access violation, namly this:
Access Violation at address 0040C54A. Write of address 0040000
umpf... somebody produced a wild pointer there?
it happens directly after launching the installer. perhaps you see what's going on there.
(btw... i've seen the installer topic but this one is about a full windows which really can't be the trick at all
EDIT: ah yeah... neraly forgot this... why can't you provide an archive for installing this one? i know people like fancy windoof installers but they tend to give troubles (had lots of troubles with the beta2 installer under old windows back then)