if you have a wallpaper website and you downloaded the free open source script in php, the installation steps are easy.. if you want to know what the command in linux shell for installing rpms its easy here is the code.

for example, lets say i have a software application in rpm format and the file is called wallpaperama.rpm this is the comand i would run:

rpm -i wallpaperama.rpm


thats it

hope this helps.