As to Tear :
Read the thread "How to install Tear" in the Applications forum.

This is how I did it :
Install rootsh with the application manager.
EDIT : Try to download and install Tear from garage.maemo.org (maemo has a link).
The appl. man. will give a message of missing packag(es),
click for the detailed description and write down what is missing.
If you do not find it with the appl. man., then :
Quit the appl.man.
Start Xterm.
Write "sudo gainroot" (if rootsh is installed this gives you root privilegies).
Write "apt-get update".
Write "apt-get install xxx" where xxx is a missing package, repeat . .
If you get an error that something is missing, install that first.

And don't forget Tear-bookmarks by Bongo.
Post #334 in the Tear thread tells how to edit them.