You need other 2 people to create multi-sig wallets and share their public keys with you. Then you can enter their keys in the blank spaces. Of course you need to share your key with them too.
That way 2 of you 3 will need to sign transactions on this wallet.
It wouldn't make much sense to create a multi-sig wallet if you have all the keys.
The purpose of a multiSig address is that you sould "store" some bitcoin with your partner for (example) a project or a contract, if you know all the private key then it is no sense to have a multiSig address 2 of 3 (better a simple address with a single private key).
LOL
I see I understand now , Feel stupid little bit . thanks for your help
I personally just wanted to have Multi signature Adress because it's cool to have an Adress starts with "3" anyway thanks for the clarification again , however.. it can be done with Multiple PC's , correct ?
~ Madness