What's wrong with opening the windows project file and doing the same operation?
Yep, your right. I just can do the same with the windows project file. Just omit the compilation step (I've a blond day

The second option sounds good, but anyway, I have to change both project files to create a valid patch!!
EDIT:
No, this failed!
After saving the windows project-file under linux, all windowspaths with backslash '\' was converted to unix-style slash '/'. That's not wat I wanted.
I can do the same thing on windows directly, but I wonder, ... that must be something wich have to be done all the day, ain't it?