Default [Q] Help with the SGH-T599N

Hi, I just got a Samsung Galaxy Exhibit SHG-T599N. I have successfully rooted the phone. Well, I think I did. All junk apps that I want to trash has the Disable or uninstall button greyed out. I didn't have that problem with my other rooted phones so I'm not sure if its truly rooted. Titanium Backup is running and says it's rooted. Did I screw up somewhere or is that how it is? Also I would like to install a custom ROM. Was thinking about PAC ROM. Does anyone know which version will work or have any recommendations? Thanks and have fun.

PS I'm not sure if this is the right thread since I couldn't find one for my phone.