Sorry, JohnnyR, I only just saw that post.
No I was not trying to install the LWAMI mod. I've been trying to run DW for the first time after downloading it from STEAM. After the first series of failed attempts I did an integrity check on Steam, uninstalled/reinstalled and fiddled with the .exe's properties such as compatibility (I selected XP/SP2) and disabling the various graphical options listed in that menu. No luck on any count. I get the little "ping" and the initial welcome screen, then always a series of ""Bitmap failed to Load" messages.
I've tried following the advice given in
this post, but my Steam install has no setup.exe.