How can you install the sims 3 PC data without the disc?

I'm not sure I 100% understand the question, but I'll try to answer. You can buy the game from Origin (it's like EA's version of Steam), so you don't really have to own the disc, if that makes sense. Other than that, I'm not sure you can really do that. Unless you're talking about stealing the game, which is illegal in any case. Hope that helps!!