Suggestions for a 5 person game?

[asb165]

5 of us are getting together to play 3 rounds this weekend. Does anyone have any formats that would work for five people?

I'm thinking of maybe a modified Stableford, but side games or other ideas are welcome. We're probably going to have to split up into a threesome and twosome, so a lot of the traditional formats aren't possible.

On the upside, one of my friend's roommates is a sculptor, and we have commissioned a trophy for the winner.