I was having problems with several scripts on an old machine. I am running slower than 2 ghtz processor, and couldn't do runebook mining or heartwood quest on that computer.
For those with the same problems, take an hour out of your time, and go see this link. Make sure you do
at least the tweaks for cpu processes, memory, network card, and hardware profile for Gamers. I can do heartwood on my antique machine now, I am not even kidding!!
It is flying now!
So if you are having problems with your old machine, running XP, go see
http://www.tweakxp.com/performance_tweaks.aspxFeel free to pm me, or post here for any questions. Though I am sure most of us here on this site can figure it out.