James,
Here are updated patches for part 3 & 4 of my previous patch set. Tell me if you think I could submit them to wine-patches.
For patch 3, the only todo_wine is when launched from root drive dir as explained in my previous mail. For patch 4, I skip a test if test is executed on root drive dir, as it doesn't make sense to execute it in this case.
If needed I can remove the skip and change expected value to be first fixed drive when test is run on root drive dir. But this is already tested by patch 3 (when run on a root drive dir).