Everytime I change up the ISO to add my .PIM and the .JPG for the loading screen, I go to save it before I burn it (in UltraISO).

I get an error message that says I need to buy the full version because the trial version can only save files less than 300MB.

What can I do? Do I really have to pay $30 to put up a different background?

Go to limewire or some p2p software and downlaod an older version with the keygen or crack. Careful with the bullsh&t files that are viruses. make sure the .zip or .rar you are downloading is atleast a couple of megs.