They have an automatic installation script for DNN on Webhost4life.  If you go into your control panel there is a section called scripts i believe.  In there there is a section for installing applications.  You go into that and under CMS in Dotnetnuke. When I was on there the install script didnt really work properly. It installed DNN, but it was a messed up version that never worked right, never upgraded properly, etc. That didnt resolve until I finally installed DNN manually.  Even then the site was dog slow on Webhost4life.  Then the worst is one day your site is down, you put in a support ticket and it stays down for a day or two with no response.

I would seriously consider moving to a different webhost as webhost4life is terrible when it comes to DNN.  Their sites are slow and their support related to DNN is lousy. 

Maybe bite the bullet and pay the extra money with PowerDNN until you really know DNN.  They are more money but worthevery penny.  Its not a huge difference... maybe $100 per year.  Believe me that $100 is worth the aggrevation you will save if there is even 1 issue.  Also PowerDNN sites are really fast, and their techs all live and breathe dotnetnuke.