Since we may have to reinstall many times after playing with configurations..
I would like to know, what is the best way to backup AND restore your data?

with os x and timemachine EVERYTHING is backed up and recovered easy.

Is there a way to do this in bt4?

I mean so I can have all my customizations looking the way I left them?

How to Backup and Restore Backtrack From a External Disk (USB Key)