Applescript assistance needed!!!

[gn0m3]

Morning Folks, I need to change permissions on a whole bunch of machines using Apple remote desktop and the "unix" function. Ive got so far but got stuck, here is what i need.

The below code compiles but i need the script to use a default username and password and to tell it a default location on a network volume where to get updates from, e.g. 192.168.*.* \*folder*

Any help would be great, thanks for looking!!

gn0m3

try
tell application "Terminal"
do script "defaults write /Library/Preferences/com.apple.SoftwareUpdate CatalogURL"
end tell
end try