Account Backup, Okay if I install Wordpress?

I have a domain hosted on dreamhost that’s up and running, however I want to install wordpress and basically build a new site with the same domain.

With the account backup, it seems pretty thorough, but just to make sure. I’d like to know after one-click installing wordpress, would I be able to restore my old site at anytime?

I assume so, but how simple would it be to restore everything the way it once was?

My advice would be to make your own backup. History has shown that dreamhost doesn’t always have current complete backups.