Urm - think about it, and the answer will come to you.
Does LANDesk do ANYTHING with the images you have? It copies them from A to B, and gets an application to install 'em. So we don't change anything here.
What else do we do? Whatever you tell us to.
So - no - nothing "really" changes ... if you used SYPSREP scripts before, you'll be using those now ... OSD is really just automating a lot of things. Once you've got a process working on your side, that could pretty much be done independently of OSD (i.e. - by hand) - but we offer automation for convenience.
Hope this answers your question then?
LANDesk EMEA Technical Lead.