Bespin and Yavin choppy problems..Help please.

[kindred1]

I am having troubles with Bespin and Yavin maps in MP,They are very choppy even with 35 pings...all other levels fly..seems to be cause its an outdoor map i guess..are there any settings i can disable to increase the performance in these levels?

I have a Radeon 64 ddr vivo, with the new omega drivers,amd 1.4 t-bird and a 80 gig hd running on xp pro....thanks for any advice...