http://bugs.winehq.org/show_bug.cgi?id=13273
--- Comment #7 from Ben Klein shacklein@gmail.com 2008-09-15 16:43:04 --- (In reply to comment #6)
winecfg *does* in fact write to the .windows-label file and .windows-serial, but here's the problem.
Wine should not *write* the .windows-label or .windows-serial files, since ISO9660 (an in particular CDROMs) are read-only filesystems.
I stand by what I said in comment #4, and still believe it is the correct solution to the problem.