You might look at running something called Services for Unix on your Windows XP box. This will allow your Windows system to act as an NFS server. I remember getting one of the Services for Unix CDs from Microsoft years ago, and found it amazing. The stuff actually worked, was not too bad to install and was FREE!! This could be loaded on your LabVIEW station and eliminate the extra PC.
A check of the Wikipedia entry indicates that SFU has morphed somewhat and may not be free anymore, but if you have an XP Professional based PC, you should be able to download (see here) and install SFU 3.5 distribution. The wiki says it will be available until 2009, so I'm gonna download it and save it away on my portable drive.
The other place to ask this type of question might be ServerFault.com; the sister site of Stack Overflow (I mentioned in another post).