reinstalling breezy

[Martin Ericsson]

Hi!
I don't know what's wrong with my (fresh, not upgrade) breezy install 
but it's extremly unstable. A lot of different applications (firefox, 
totem, the kernel, ontv, the clock applet) have crashed my computer, 
forcing me to restart the computer with the power-switch. 

Is there any way to reinstall breezy, or just reinstall all packages?

My home-partition is on a separate partition, so can I just reinstall it 
and tell the installation program to use that partition as my 
home-folder? If so, what will happen to my settings? Will breezy 
reinstall default settings for the applications?

Regards,
Martin Ericsson