Pro Sites Configuration

Hi - I would like some help on configuring my Pro Sites installation. I am in the process of creating an "edublogs" style site but am getting lost with the myriad of options I have available.

I would simply like to create a set of graphics or buttons on my home page that will link to the sign up page of the appropriate subscription level. i.e. very much like the option of free, pro or campus on the edublogs homepage. The trouble is I do not know how to create the individual sign up pages or know what url to link my graphics or buttons to.

I would also like to install a 'comparison' page to allow customers to compare the subscription levels. I have come across this plugin

but wondered if WPMU Dev had a better alternative.

Any help would be greatly appreciated.

Kind Regards,