Exclamation Skyrocket rom installation error

Hello everyone,

i have an issue with my skyrocket, i update it to 4.1.2 Android version with the at&t stock rom and now i am trying to install a custom rom and it doesnt let me do it, the error is always the same "installation aborted, file for a skyrocket, this is a Hercules" or something like that, i am sure that my phone is an at&t skyrocket, thats what it says everywhere. i've been trying with recovery rom installation and nothing happens.

i have read that the stock rom could fix the error, i have try but nothing happens. i dont know if there is a way to install custom roms using odin but i have been researching and nothing.

PLEASE HELP LOL