Auto patcher/Game launcher

Hi, i realy love the unity engine it's so easy and yeah, but i need some help. I want to release a game but i need a game launcher like... World of Warcraft launcher or WarZ. You dubble click in the icon then a window come up where you have the "Play Game" button is and the latest news and a auto patcher and that is what i need. I know about M2H patcher but that is realy exsensive 125$ is like 750NOK (Norwgian money) So i realy apriciate if i cold get a step by step guide on how to make one of them, thanks.

Regards Eirik