Reinstall Plesk 9.3 from command line

Hi,

I have installed:
CentOS 5 con Plesk 9 (64 bit)
Parallels Plesk Panel-Version 9.3.0
Linux 2.6.27.41rootserver-20091211a


I guess that by accident (missing knowledge) I deleted some files with Putty :-(....and doing backups, recovering etc. I get a lot of fatal errors...

For this reason i would like to try to reinstall Plesk 9.3 from the command line.

It would be great if you could give me a hand. How to to it (recover / restore / reinstall) Plesk 9.3?

Thanx a lot

Gerald