The following two demos show how to get started with recording and replaying macros using the iMacros plugin for IE or FireFox or the iMacros browser (actually the demo shows the FF plugin, but the others work exactly the same).
Demo 1:Recording / Replaying (Using iMacros as a kind of bookmark)
http://forum.iopus.com/_uploads/FF_simple_bookmark.htm
Demo 2: Following links, filling out textboxes, clicking link images (Using iMacros as an "intelligent" bookmark)
http://forum.iopus.com/_uploads/FF_simple_textfield.htm
If you haven't yet installed iMacros, just download it at http://iopus.com/download/
Enjoy,
Hannes