Welcome rimadreamer. Here are some things I found useful for your same issues when I was first getting started.

2) http://talk.maemo.org/showthread.php?t=30528

3) definitely Diablo Turbo

4) I think you can remove most games through the application manager

5) I like maemomapper.

http://maemo.org/downloads/product/OS2008/maemo-mapper/

http://fragostech.com/MaemoMapper/


Enjoy!