joomla 1.5 dj classfields new features or other system

I have Joomla 1.5 with pre-loaded onto the module classfields dj. I would like to enter a few changes and facilities: -the ability to edit their own fields from the admin panel -adding a payment module [login to view URL] or [login to view URL] -dj classfields connection with the slider on the homepage offers promoted -google maps integration -Polish map of breakdowns in the region -and somehow arrange it all nicely on the homepage is meant to feed of hands and feet : ) page can be seen at this address as it looks now [login to view URL]