iPhoto for usb movie catalogue

Hi all,

I would like to use iPhoto for building a very simple portable movie catalogue on USB drive. By portable I mean unplug usb and replug the drive on other mac with iPhoto 09.
I don't know much about iPhoto, I have just two years experience as a mac user. These are the questions:

1)
I have movies and programs recorded from TV (.mpg or xvid), and I want to put few keywords on it for search purpose or, if not possible, create album based for example on subject (sci-fi, thriller, actor, ecc...).
Do you think this can be achieved with iPhoto ?

2)
Is iPhoto accepting all known common formats, mpg, avi, xvid, flv...or is going to convert to a proprietary format ? Or for example to .mov format ?

3)
The current folder holding the hierarchy of movie, is about 500Gb, based on this, how much space iPhoto would take to create its own library.

4)
Is it possible to create album and sub-album, or event and subevent, for example sci-fi and inside another album called 70 (holding all movie of 1970).


Don't want to go off-topic, if iPhoto is not suited for this, could you suggest an alternative ?

thanks