[Allan] By setting TM_PROJECT_UUID to the “null UUID” it will create a new project window for the file

Marvelous; that's just what I was looking for.  Thanks.

[Martin] Useful, but shouldn’t there be a semicolon just before “mate”, like this:

In BASH, the syntax `A=B C` means that environment variable A is set while executing C.  On the other hand, `A=B ; C` means that A is a local variable which is not passed on to C's environment, so it won't work for this scenario.

[Louis] Thank you again for creating TextMate, I love this editor, and I think I would not be so fond of programming if I hadn't TextMate.

+1!