here's a workaround for 'extracting' the test executables from Paul Millar's exe. Start winetest, wait until the first test starts, and then kill winetest.exe (or close the winetest window). Then you can find the test binaries in c:\Windows\Temp\wct (or possibly c:\Documents and Settings\your account\Local Settings\Temp or something like that). Then you can run just the test you want.
Thanks, I'll do that! --Juan