Runonce popup

Hi,

I'm currently deploying computer using a custom windows xp pro build with all the latest patches(except SP2) and stored them in the I386/Update folder with svcpack.inf pointing to them. The problem i have is when it's going through the RunOnce and installing my software like Windows Media Player, i get a prompt asking for the username and password. Then afterwards it asks if i want to open, save, the file (just like IE prompt). I never had this problem before and was wondering if this is due to one of the new patches or updates from this year or becasue i changed the path pointing to a DFS share? Let me know thanks

sample: Pointing to a DFS share

REG ADD %KEY%\015 /VE /D "Configuring ADT 2004 Custom Profile" /f

REG ADD %KEY%\015 /V 1 /D "net use \\****** /user:**************" /f

REG ADD %KEY%\015 /V 2 /D "\\**********\it\Utilities\AutoDesk\BatchMods\ADT2004Mods.bat" /f