[MOVED] Core Engine Questions

[MOVED] Core Engine Questions

I am a jquery newbie.   We automated a site recently and several jquery's came to using a core engine of jquery 1.3.2

What does the core engine do?  Should one core be OK for all jquery's?

I also have two cores associated with the site as there is a module I rebuilt because it came to us not keyboard accessible.  

When I tried to use one base core, but the functionality didn't work.  So far I haven't had a problem.

Thank you in advance

Nancy Johnson