what type of server is being used at this moment, a semi"normal" Computer or a traditional server...
if it is a computer and not a server you can even add a tool into the mod that when activated takes up about 2,5% of the client computer efficiency... believe me doesnt sound like much but works like a charm, have been running a game server for counterstrike on a Intel Celeron 466mhz 512mb SDram 40gb 10/100mbit NIC for about 4 years and never had latency above 40.... with 4 clients it can still hold up but every client extra made it work a bit harder. when using the power of the client to calculate some of the visual aspects all u really need is a pretty decent uploading stream and bandwidth to make sure you connection wont become a bottleneck...
Maybe its an idea just take a look into it... if not ill try to get some info on a few server expansions to make the server faster ^^ we just kicked out an old server with max cap. for 2x 2.4 P4 proz, 8gb ram and 6 hot-swap drives:)
Edit: Seems to be a bit off topic, if needed delete or move this reply somewhere else
"War. War never changes. Since the dawn of human kind, when our ancestors first discovered the killing power of rock and bone, blood has been spilled in the name of everything, from God to justice to simple, psychotic rage."
