http://bugs.winehq.org/show_bug.cgi?id=15202
--- Comment #6 from Vitaliy Margolen vitaliy@kievinfo.com 2008-09-09 15:42:44 --- In case you forgotten - windows does use registry. Not config files. Not xml.
The only "text" format registry can be written to/read from is ... .reg files. You can do that with regedit to both export to/import from.
However it is not 1-to-1 mapping, as you loosing lots of information while doing that (on windows, Wine doesn't have all that ... yet). Reg files don't store access permissions and modification times.
The resolution stands - you can not edit registry as a text files. Not on Windows and not on Wine (if you really so ignorant and can't look at ~/.wine directory).