Set a Page file with the same no, Ie min = 1024, Max 1024.
This way, the HDD head will spend less time going through the diff part of the HDD to get page file data. But you need to do a defrag and cluster the page file together.

For gamming wise, i believe a upgrade to a DX10 cards seems to be the way to go. Currently there not any DX10 AGP version so you might hang ard. Unless u die die want it now, the best bet will be ATI X1950Pro series card. Check to make sure u have enough 'juice' in ur power supply 1st before embarking on any purchase.

Try looking ard the 2nd hand market for good deals on DDR rams, it better that way.