VPN over wireless

Running SBS 2003 Premium, Exchange, ISA 2004, SQL, 2 NIC's, router, L2/L3
switch, WSUS.
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I am setting up a separate network for Guest access using a wireless router
with a fixed IP conected to the T1 Cisco router. My access points are in
near-by buildings and connectivity is good. Our lab is busy from Spring to
early Fall with undergraduate and graduate students, and a part of their
duties is to input data into Excel sheets and database forms. I put a
couple old PIII's out there with wireless cards and would like to give them
access to the LAN so they can get to those resources. Money is tight,
otherwise I'd set up another wireless network. Can I use VPN in this
scenario? (I've never used it or seen it in use.) The setup seems pretty
simple. We are in a remote rural area so I'm not worried about anyone else
getting in. I'm pretty sure I can lock the users down with folder/file
permissions so they can't stray where they shouldn't. (GP is probably
better, but that's another area I've never gotten into.)

Any and all suggestions and comments are welcome!

--
Mike Webb
Platte River Whooping Crane Maintenance Trust, Inc.
a 501 (c)(3) conservation non-profit organization


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