joomla web updates requires

Hi, i currently requires joomla [login to view URL] have a website for students that you can reach at www.studi-pinnwand.de. the page was designed with joomla 1.0.12 stable. I need the following done on this homepage: 1-Install sh404 and run to be able for the page to generate user-friendly urls. 2- Install components letterman and massmail. 3- Update the current joomla version of the domain (joomla 1.0.12) to the current up-to-date version. For the case that there are serious doubts on the stability of the most up-to-date version, an older version that has proven itself shall be used. 4- Install and integrate the component “getmycontacts” into the site “freunde werben” of [login to view URL] however, i should mention that the homepage has been advanced by self programmed components, so that there need to be made some adjustments before sh404 and getmycontacts can be installed. thank you