if you have shared drive on the pc's try mapping a drive to them.
On XP
From Windows Explorer
Tools menu
Map network drive
in the folder box type \\<computername>\<shared folder>
where <computername> = the remote computer name
and <shared folder> = the shared folder
Vista will do some thing very similar.
or go to the command prompt and type:
net use * \\<computername>\<shared folder>
this will also map a drive letter to the shared folder