Shared object how to?

I have abc.swf that gets loaded into main.fla

abc.swf has about 15 frames on it’s timeline. Even though I am using flash CS5 and AS3.0, I am doing the code in timeline right now.

I wanted to know how do I use shared object to remember the last visited frame of the user and then to make sure it goes to that frame on the next visit?

Any help appreciated

Thank you

P.S.I can find tutorials for shared object on saving entered data, but not too sure how I can remem a frame.