Is is possible to have one of my tabs be an internet browser, or even MSWord?
No.
There was a post not long ago about using a program(Afloat) so you can keep a cocoa based program on top. MS WORD isn't cocoa based, but there are other WP programs that are, like Mellel. I'd use Camino instead of Safari if you want a browser to go with L4M since it uses less resources.
