[Q] SGH-i747m bootloop & TWRP flashing issues topic

So iv rooted, and using goo manager (can't use Odin because I don't have PC and this was easier) I flashed the latest version of twrp. I first did a nandroid backup and then tried to flash PAC ROM 4.4.2 nightly and cm11 neither worked (I have tried others since then) each time it says "no md5 file found". Its not the end of the world if I have to use the stock ROM for a while till I sort this out.. But when I flashed my nandroid backup I got stuck in a bootloop now I don't know what to do. I can get to twrp still and download mode if nessessary
Please help im a bit of a noob but I'm not stupid and have flashed ROMs on 3 devices successfully. Thanks in advance! I would be greatful for a fix to either of these problems.