I don't know if you play CS, but I love the pool map fy_pool_day. Make something like that! Unless it's too hard...
It's basically a pool, locker rooms on each side. There's guns in the locker rooms, and hallways on either side of the pool connect the locker rooms. On the bottom of the pool (you can swim in it) there are HE grenades.
sweet once you get this done let me know I love bf2! make sure there are tons of tanks, apache helicopters, and planes too! I hate it when all the vehicles are taken lol!