Best practce for calling functions between models

[eluser]mact1079[/eluser]
Hmm ok, I guess two different opinions there. Is that the best practice rule to apply? If I have to use more than one model then I should move those functions to a class in the libraries folder and do it all there? Or do you have any other rules of when to use libraries to guide me?

http://ellislab.com/codeigniter/user-gui...aries.html is useful in telling me how to use custom or native libraries but I'd like to make sure I'm using them appropriately.

Thanks very much. I am really appreciating the community support for CI as someone who is new to it. Don't know where I'd be without you guys! or gals!