Old School Project

Just looking through my stash and throwing unusable stuff away when I found something interesting! Take a look at this cardboard box ffs, ill place it somewhere ppl might see it! :)
I might put this into my old fractal design XL and see what it does,, ill try find the most suited components to go with it, cant use something too new =P

So Far I've got:
Fractal design Define XL
Ocz modXtremepro 500w
ECS A780GM-A Black series
Ocz PC8500 4gb
Amd Phenom 9650
XFX 8800 GTS
HDD: 320 x2 + 1TB
Wireless Network Card with 3 antennas!!

The Question is, what should I do with it?
-overclock(if its possible)?
-Storage on the network?
-WinXP with like every game I cant play on my pc? (I cant start Max payne 1&2 for instance)