You will need to follow the offical documents to get the following files; payment.addr, payment.skey, stake.skey, cold.skey, pool-registration.cert, delegation.cert. If you already have them you can skip to registering your pool section. Otherwise follow the following instructions.
All you have to do is the following command
./pool-reg-crt.sh <payment.addr> <payment.skey> <stake.skey> <cold.skey> <pool-registration.cert> <delegation.cert>
It will display all the txhashs and ask for the one that has stake + fee. Then it will ask you for the fee (500ADA). That's it.