I believe you will have to use 'sudo' before running the command. Open a terminal window and navigate to the location that you installed the files. After that type 'sudo xxxxxxx.xxx' (I forget the exact name of the file to run but basically replace the xxxxxx.xxx with the correct filename) and just accept the defaults. This will install it for you. Basically your standard account does not have admin rights per se. Using sudo allows the program to function as a SU.

Hope this helps.

Cheers

Kevin