Online database of 5334 Problems? and other questions

Hello all,

I am just getting into chess (a few brief forays over the years, but I'd like to make a concerted effort now) and I had a few questions I was hoping people could answer.

A year or so ago, I had a link to an online database of the different tactics problems in the book 5334 Problems, Combinations and Games.  This was very useful as I much prefer to study on the computer. 

If anyone has a link to it, that would be great.  To clarify, I am not talking about a link to a pdf.

Also, what is the best .pgn viewer for mac? and the best mac client for FICS?

Thanks for the help.  Hopefully in a few months I can turn this help around and help annotate someone's games... Though maybe a few months is setting my expectations too high. 

Onward to mastery!