A file exists in guest Windows XP (under Fusion), can I open the file in an OSX program? So the text editor on Windows is crap.  I realize I could find a fancier text editor that works within Windows but I'm happy with TextMate on my Mac and I'd rather not have two "fancy" text editors (one for the windows guest and one for the mach host).

Is there a way I can right-click a windows (again, I'm running Windows XP as a guest operation system under Fusion) txt file and have it open in TextMate on my Mac?

I woudn't mind if I had to do this manually each time but a permanent association would be even cooler...

In case it helps the guest is Windows XP (latest SP) and the host is OSX 10.7.3 with the latest Fusion.  Also, I've got several directories mapped from the Mac to the Windows installation (as Z: drive or something) in case this helps and can add more shares.

PS - I don't expect anything crazy like that TextMate would show up "within" Windows XP.  I'm happy have TextMate launch outside of the guest OS window with the file in question.  More bonus would be if I could edit the file and save it (the save going to the Windows guest).
If you keep your files in the OS-X file system and share those folders with your guest - as in your Z: drive example - you can access them from either OS (or both, if you're careful), plus however you backup OS-X will also back up your changed XP files without its having to backup your entire guest VDD for a (e.g.) one-line edit.  

The save would not go to your guest file system though, so if that's a hard requirement, this suggestion won't help.  If you just need the guest to have access to it, this would be the way to go.