http://bugs.winehq.org/show_bug.cgi?id=11788
--- Comment #25 from Alexander Dorofeyev alexd4@inbox.lv 2008-04-13 12:00:02 --- Created an attachment (id=12131) --> (http://bugs.winehq.org/attachment.cgi?id=12131) binary patch of IDMain.exe to fix wrong ptr access (xdelta)
As a workaround, I patched a few instructions in Icewind Dale HofW IDMain.exe and generated a binary patch using the xdelta utility. Perhaps this can help.