There must be something wrong with that, since I have PentiumIII600Mhz, with only 64Mb of RAM, and XoloX isn't really slowing down my computer significantly, though I can't say how many percentages it uses. I do can say from experience, that Limewire uses much more of my resources. It could be it's your windows2000, cause I have win98SE.
If you can't find any solution to your problem, you could find Gnucleus to be pretty fast - it's way faster than any other gnutella-ptop, but it's not perfect either.

funny...many complaints about CPU Usage.
I'm running an Athlon 750 Overclocked to 1 Gig
WinXP Pro
256 Megs of ram
Xolox only uses 30% CPU.
Even if I run EDonkey with Xolox I can still browse the web and do other tasks without any slowdown or lockups.
No, I'm not running any RAM Optimizer or RAM Drives so maybe I'm lucky, maybe you people with CPU problems don't have your system optimized correctly or you have a POS from that computer manufacturer that uses the cow spots on their box.
Anyway, Xolox is the thing to use for mp3s now that AudioGalaxy is filter happy.

with xolox, 3 ie browser windows, winamp w/ visuals, mirc, meaya popupfilter, my control panel running it uses about 9% of my cpu with a 900 k7/512mb sdram. oh it's crucial pc133, not generic

it doesn't lag me at all, but for such a simple program i'd expect it to use 1/3 the ram instead of nearly 17mb.

I am running an Athlon 1.2 with 256 sdram 133, and I have no probs with resources.
I happily run XoLoX, E-Donkey, stream video and browse quiet happily.
I even had all that and played on Unreal for half an hour with no noticeable diff.
All I can say is. PC's r weird S*** LOL

Great program, no complaints whatsoever. No one seems to download from me but that might just be my wierd taste in music!