Sorted - If I had spent some more time researching (as I did yesterday afternoon), I would have found the code below sooner! Have included the code in case someone else goes looking for it.

code:
  

$domain = GetObject("WinNT://@LDOMAIN")
$domain.filter = "group",""
For Each $group in $domain
	If SubStr($group.name,1,31) = "Software - Office Tools"
		? $group.name + ".."
		For Each $user in $group.members
			$1 = $user.name
			Shell '%COMSPEC% /C net group "Software - Office Tools" $1 /delete /domain'
			? " $1	" Color g+/n "Updated"
		Next
	EndIf
Next