At the moment I have stock ROM flashed using Odin since all my tries to flash latest CWM and ROM ended in a bootloop or I didn't even manage to flash anything. If I try to flash CWM through stock Android recovery, it says "Signature verification failed". I flashed Dorimanx kernel using Odin to get the recovery but then I couldn't flash ROM because it said "E: Can't mount sd card". I tried flashing Resurrection Remix ROM.
I have no idea what to do because everytime I think something new, I run into these 2 errors. It would be great to get some help.