do I need dual pack or a single memory stick?
Get a 'dual pack' - So you can enable dual channel on your motherboard. This will give you an increase of around 3-5% in performace!
higher latency sticks are best.
Any suggestions on which memory brand to get?
<A HREF="http://www.newegg.com/app/ViewProductDesc.asp?description=20-220-002&depa=0" target="_new">512mb version...get the 1 Gig get if you want</A>
Who's the man with the master plan?