Well, depending on how extensive you want this solution to be, someting as easiy as windows LAN network (sharing) between your laptop (w/ wireless) and her workstation (wired) would allow file xfer. Is there some requirement thtat the workstaion have a wireless connection? Is there some reason your wireless laptop would not be able to connect to the LAN the workstation is on (IE no WAP for access)?
If the later is true, then there is a means of connecting 2 hosts directly, its called ad-hock. I don't know much about it, I'm only familar with LAN's w/ WAP that I connect to. I suppose this would be much more convienent than directly connecting 2 boxes via NULL MODEM cable, patch cables, etc...
Windows has a syncronization mechanism that is geared toward keeping redundant copies of the same files at 2 places. When one isn't connected to the other, and that data changes, its sync's upon next connction so theire is a dual redunandat backup of the same info at both places. I'd advise looking into a 3rd party application to do this for you though, and not completley rely on MS for that.
If it were me, and I didn't want to spend alot or anything, I would just figure out the network connection stuff, and make it 'procedure' to manually copy, backup, refresh files on both boxes so that they match everytime I connect to 2. Simple files management. There are easier ways though obviously, but at a price.
I hope any of this was helpful