Thanks. I did find a site (posted here in Resources, I believe) that had a wide array of grids (including hexes). I just imported one, resized, and put it on Multiply.

In other news, I never really finished these maps beyond what I posted here. Guess I was just playing around. I do want to do some more modern building mapping practice at some point...but I'm way bogged down in other stuff. Next time I GM a GURPS game I'll give it another go. I think my next scheduled event is a space zombies game (ever seen Pandorum? It's a lot like that, except I came up with most of it before I ever even heard of the movie. Nothing new under the sun I guess) so I may get to try my hand at some sci-fi mapping. That'll be fun!
M