Hi Jason,
PM is the most awesome tools I have ever found for handling passwords online, but it is not something you can just install and use without thinking... you must understand how it works first. It isn;t all that complicated, but it isn't brain-dead simple either...
I highly recommend that you read all of the Help Manual before starting to use PM for your live Accounts - create a few dummy accounts in Yahoo or Hotmail to play with to get the feel for it, and ask questrions here until you get the hang of it (shouldn't take more than an hour or two, and it is *well* worth the time invested).