DP - Backup himself

Hi every one,

is it recomended i do backup of the own Data Protector Server ?

Generaly, i do backup Internal Database and Windows System files (c: and configuration:), in all folders and all files, is it correct or  i need to backup data only in folders OmniBack (c:\programdata\Omniback , c:\Program Files\Omniback and C:\Program Files (86)\OmniBack) ?

if the server DP fails, how to restore himself ?

I think so: i'll need to install DP in other server, then, restore data protector server in server fails?

is it correct?

Thanks