wine users - Aug 2008 - How to run a program with swedish characters in the path?

I have a program called "Dieselr?ttor & Sj?mansm?ss" (Dieselrats
and sailormice - a kids game). Installing this does not work, the installer does
not complain but the folder in c:\Program Files is not created. According to
installer it should be c:\Program Files\PAN Vision\Dieselr?ttor &
Sj?mansm?ss

I'm pretty sure it's a problem with the non ascii characters after
performing a little experiment: I tried to change the install path to something
without the ? and ? i the name. This resulted in creation of the folder in
c:\Program Files but none of the subsequent content.

Operating system: Linux/Gentoo
Wine version: same result with 0.9.61 and 1.0

/Ess