You could try googling that dll and downloading it from wherever you can get it, then putting it into the main game folder.

Might still not work tho. I got it running, but the 3d/game world view won't display: it's just a black screen, with the 'status bar' displaying ok beneath. I think the problem is that my (widescreen) monitor does not support the low screen resolution or colour depth needed. It used to work fine on my XP machine with an older, CRT monitor. I have an old laptop somewhere that might do the trick.