I will shut up. I worked it out.
Go into admin, goto mambots in the menu, then choose site mambots.
When in here click the new icon and add in the details about the new mambo and which folder you put it in (best in content).
Works a treat now with 4.5.1a.
There is a also a fix here for some people who have issues with 4.5.1a
http://forum.mamboserver.com/showthr...ght=partystaff
rgds
Paul