Dude, in the Windows' wireless settings, try enabling UnP... let me check a second....
...

Ok, I can't find the thing... but enable a check-box called UnP or UPn (not the TV network!)... anyways, when you enable this, (in both computers), you're able to access the Shared Folders in both computers...

I think that's what you're after...

BTW: If you want to make a super computer out of two... you need a Linux Beowulf cluster setup... good luck on that one...