Ive been searching posts and trying to follow all directions without worrying anybody as I know you all are busy. However I have finally gotten myself into a bootloop. I have a sprint Sm-n900p I rooted with chainfire method successfully. I felt confident after that and decided to try to setup to use with straight talk wireless (Which is the ultimate goal) I flashed the Modem.tar.md5 file to the phone via odin based on the thread (Domestic Sim Unlock For T-Mobile/AT&T or MVNO's Solved (N900P) and now it continually reboots.