Default Samsung SGH-i997 Help

Hey, I am a complete beginner when it comes to setting up a new
custom ROM to my device. Even though I am a beginner I'm not hopeless.
All I need is a little more clear instructions in order to smoothly figure this
out. I'm trying to install a ROM sort of like jellybean to my Samsung SGH-i997.
I went through the process of rooting it all I need now is the actual thing on my
phone. Anyone who would like to help please contact me as soon as possible.
Thanks! I would totally appreciate it!