[wp-hackers] OOP in wordpress

[john]

I'm currently programming a plugin that allows registered users to 
create their own profile pages and upload images for an their own 
personal image gallery. I'm attempting an OOP approach but having 
problems getting things to work. I really need some plugins / code 
examples where multipage ie. multi-step forms are used in a wp plugin or 
where users can edit and change their own information. I tried taking a 
look at buddypress but its massive, if anyone knows of links to plugins 
or coding examples on a smaller scale I would greatly appreciate it!