Computer HD acting as a PS2 memory card?

Well, I recently got my X-Port device (works awesome!) and I normally back-up all my saves to my PC HD. (in case of some damn holiday demo disk again). Anyways, is there a way to have PS2 games read the computer HD thinking it's a ps2 card and have gigs of free space? Maybe create a mimicking file on the hd that's a gb in size? Just wondering since I would enjoy having more replay saves from many of my games.

I love my Xbox.

if the ps2 is like the psp, in order to save files, the psp would have to reformat the save device in order to creat root directories in them. so...im guessing no?

No it can't be done at least not yet...