Hi again....sorry but dont know very much about PS2 - PC Harddisk compatibility....but if its possible...then (in case you already have a boot-HDD with some OS in your PC )...then set your PS2 HDD to slave (with jumpers on HDD) and it should work just fine (although i am not sure about PS2's file system!?) - otherwise you would need to format it into FAT or NTFS....and then it should work just fine....
I hope Emperor (or some other members) will come by and tell you more about it....cause he is a REAL PS2 freak....
Good luck!
SF.