Of course, no prob.
I got info about the memory requirement here:
http://developer.apple.com/java/download.html
You will need to be running Runtime For Java 2.2.5 on your machine, and this is where you get it. I would imagine it's already on your machine. Look in your Apple Extras folder for a folder called Mac OS Runtime For Java and check the version number. If you haven't got it, install it now.
Open the Memory Control Panel (it's in Control Panels in the System Folder). Make sure Virtual Memory is switched on. The recommendation is that you then increase the number that appears (this represents the virtual memory Mb you're allocating the machine) by at least 44, but preferably by 64 or more. How much you can allocate is determined by how much RAM you've got installed on your machine). Personally I added 180. Leave RAM disk off. Reboot your computer.
Go to Apple Menu > About This Computer. Check how much memory your OS is using, see how much memory is available to you, do the maths and decide how much memory you can afford to give limewire (plus leave some "extra" for the system, to be on the safe side). Obviously, any other programs you run simultaneously will drain available RAM. Then...
Highlight the Limewire program icon (the actual one, not an alias). Once it's highlighted go to the file menu (top of the screen by the apple menu icon), and select File>Get Info>Memory. This is where you set the memory each program "asks" for from the system. Set Preferred Size to the value you decided on, and set Minimum Size to a smaller size (this is the least RAM you want the system to allocate, ie. when you're running other applications simultaneously etc). Suggested Size is meaningless. I have 385Mb RAM, so I've set my Preferred to 100,000 and Minimum to 70,000 and it's working a treat. If you have only 125Mb RAM or something, I'd suggest you should go to at least 250.
Then (last bit), find the advice written by SBERLIN on this forum site about speeding up the program. It involves a tiny bit of editing of one of the documents which comes with the program and works really well.
Hope you get it sorted.
ajskully@talk21.com