Regarding the post about Windows 7 sometimes disconnecting network drives automatically, you can fix that so it doesnt give you an error. We recently installed win7 on some new engineering computers and I had to do this on one of them.
 
"In Windows 7 and Vista mapped network drives will disconnect themselves after a time and show a red cross on the drive icon. You will still be able to click on the drive and see/use the contents but applications that require a network drive will see them as disconnected and will not see files.If you try to disconnect the drive it will still sit there saying 'Disconnected Network Drive' - the only solution is to reboot.
This is because there is a default disconnect time for inactive network connections. To correct this and turn the autodisconnect off do the following:
Open the command prompt as Administrator - to do this either click Start\All Programs\Accessories and RIGHT click the Command Prompt icon then LEFT click Start as Administrator or type CMD into the search box and hold Control & Shift keys down then press enter.
 
In the Command box type:
 
net config server /autodisconnect:-1
 
and press return.
 
Reboot computer.
Your mapped network drives should now stay connected - this is a permanent fix.
Also - when connecting mapped drives to Vista or Windows 7 - connect them with the full domain name of the server i.e.   \\servername.domain.local\sharename  NOT \\servername\sharename - Vista/Windows 7 insist on full domain paths in order to reconnect. You can connect using just servername but if it needs to reconnect it will not find the server."

I imagine if you just have a workgroup, then it will not require a domain in the path, since there isnt a domain that exists on the network. I've never had to test that since we use a domain, so try it out!