Aol can be removed properly through windows add/remove.
It will still be necessary to search for and delete all the folders which are left lying around. They will not upset anything, but make the place untidy.
DO NOT delete any of these until add/remove has done its stuff.
Address book is a an almost insurmountable problem, becuse the a/c has lapsed and there's no way back directly to the Address book.
However if you can find the file ORGANIZE deep in the bowels of documents > all users and so on you will find a file called (Screenname).abi
Open this with Word (Recover text from any file) and amongst a lot of indecipherable dross you should find all the "recent" emails and some other things.
A laborious business of copying a phrase or so at a time.
NB this Organize file is not among the files in program files, it has to be searched through Documents and Settings > All users > Application Data> Aol > etc etc.