Why not take the stuff of it on the friends mac computer and have him upload it somewhere like Dropbox, format, then download the stuff back onto it? Would save you some money from buying a new one.
I think it really depends on the size of the map. A small duel sized map should maybe only have 3 or 4, while huge maps could have a dozen. So long as people aren't finding one every two steps, I think you'll be fine.
What if the mod were only for duels, and not FFA? Then time slowing down for the dead person and the player wouldn't affect anyone else, and anyone in spectate would just view the slowdown as well, because they're spectators.
The first friend I made in college was as big of a Star Wars buff as I was. He gave me a copied disc of the game (I've since purchased it on Steam) so that we could play together. It was my first multiplayer game, in fact. I'd never had a pc or internet connection before college that could handle games that didn't come out in like.. 1996. I'm glad he introduced me, because if he hadn't I wouldn't have met some of my best friends or my husband.
I like the closeness of the bars at the top, but it blocks the image in the background. If you've got the theme where the windows are shorter in width and centered, though, that wouldn't be an issue.