yeah, the 2003 server has an account called admin for the drive map.
sims2006 does indeed work. it just doesn't stick. if I log off, any logon from that point will result it the drive not reauthing and throws up a load error if sims is started or from my computer throws up the login window.
if I disconnect all drive mappings and login again it's fine and the cycle repeats
What happens if you try this
net use R: \\sims2006\sharename /user:sims2006\admin password /persistent:yes
still in testing. kinda put on hold while I use half term for a few other jobs, although I think I'm still having problems.