Temporary car auto insurance in California?

[albertiscray]

Hi guys,

I thought of using my friend's car for a month and half since he will be out of station. I was wondering what would it take or rather how to address the insurance issue. Is it possible to get a temporary insurance for a month or is it possible to add my name on to his insurance for a short term? Either ways, how much would it cost ! Also would be great if you guys can enlighten me on some of the providers here.