Does wine support this? I initially did it this way copying from programs/msiexec
Have a look at programs/uninstaller/main.c. Most likely you need to add -municode to APPMODE switches in Makefile.in.
Thanks Dmitry - 100% accurate, ie it was the -municode option. I'll submit it as a patch on the end of the patchset, and do xcopy as well!
The things you learn doing this.. Jason