I understand your pain.
But if your on such a tight budget, i dont know if its worth to get parts now that you will throw away in 2 month.
I have no idea what comp you have, but i guess keeping the cpu and just buy ram and graphic card would get you going in ah2. No guarantee though.
Also you could maybe buy a graphic board and ram that will fit your dream machine later? Its of course not that easy.. have to watch that the card doesnt draw to much current.
Anyway good luck
ciao schutt