[Help] fail skin mod

ok so i was trying my first attempt at a m16 skin just added flames to the stock followed the tut file was the same size copied the hex lines and deleted the last 4 but when i got in game the m16 was just multicolored pixels skin anyone know what i did wrong

Maybe you have to completely cover/clear the old texture. I'm not sure if 'mixing' patterns works.

Hex editing fail, search before posting, already posted.

copy the first 3 lines, then add 4 groups of "00", then delete the last 4, save then convert