Hi there Postal
Firstly, roughly where in the world are you?
I have a couple of spare AGP boards kicking around, happy to send one your way if you're not in some research station in the Antarctic.
Secondly, go to crucial.com and find out what the max RAM you can have.
I may have some RAM too. (Or so might another kind subsimmer around these parts)
Thirdly, download a little program called Belarc Advisor (free), run it and tell us what motherboard you have.
This will help us with the graphics card to see what sort of slot you've got. If it's AGP x2 then sending a x4 card wont help greatly.
All worth a go if you really can't plump for a new PC right now!