I suspect OS and versions could be helpful for someone who would be able to answer; I'll assume here it's two Windows machines, but I'm not a Windows person myself. Do you know how to use Windows sharing in general -- i.e., could you get these two machines sharing files if they were both on a wired hub?
When I was using Windows, I was able to connect my Win98 desktop to my WinME NoteBook. But after "upgrading" to an XP desktop, I couldn't figure it out. (Maybe I'm not a geek after all.)
When I switched to Mac, I couldn't believe how easy it is to wirelessly transfer files between my PowerBook and iMac using the built-in Bluetooth file transfer.
"We're kind of on the level of crossword puzzle writers... And no one ever goes to them and gives them an award." ~Joe Strummer sscce.org