Well, have found a solution to first part of my problem.
This
quide explains how to
how to switch to PHP5 using .htaccess.
The second part (update php5 version) is not solved yet because no body answer to the open tickets @ support service.
Im looking a way to update the php5 myselft or install a newer version of php5 on my own sites. Maybe this sounds ridiculous but without any support from page-zone I need alternatives.
Any sugestions ?