Well you need to ensure safe mode is off the server paths are correct and the data and uploads folders are 777.
If you do that then things should work just fine. You never got it installed last time because we had given you advise and you choose to give up.
Our install is about a medium difficulty so it is not for everyone that is also why we offer install service for $59.00 for those who are not comfortable installing things.
The installation instructions are pretty detailed so they always help
http://www.photopost.com/installphp.html