Ok im scared to hack or mod my unit b/c im scared of screwing up and breaking my unit. I changed my boot up picture but is there any other customizing i can do without messing with files?

You can change the key colors

The hacks you see being done rewrite how the avic does things. The only way to get that in-depth with modificatins is to go into the internal files and change them. But why are you scared? You have numerous hackers here who made it easy for people like you to do these hacks. A simple rename and edit paste isn't too bad, no?