Tam,
If I understand you, you want to share hard drives between your 2 pcs. First you must set up sharing. Go to 'my computer' open that folder and right click on the drive you want to share (typically C ) highlight sharing in the menu and a box will come up with the sharing options. Use 'shared as' and enter the type of access you want (I use depends on password and strongly advise you do to if you don't want others screwing around with your data) and click ok (duh
) Now open 'network neighborhood' (it's on the desktop) you should see your pcs in the list (they are listed with your pcs network name). Click on the pc you want to access and then on the drive you want to access. If you used a password enter it and your in. Hope that helps.
Mark