I have my custom content showing up in the downloaded content section, but when I click install, it brings up the little loading screen and then crashes. It says that it's not responding. I already have installed CC and it'll allow me to download one or two and then it just straight up refuses to install anything else. It's really frustrating. Even if I'm only trying to download a single piece of cc, it crashes. I don't know if it's the piece of custom content or something else. I was wondering if there's a way to fix this or how to fix this. I appreciate the help.

http://simswiki.info/wiki.php?title...Launcher_Issues has several things you can try. Hopefully one of them will fix your problem.
(Note: the only reason I found this link was because I knew it was there someplace. )

You can also try individually going to each sims3pack and "open"ing it outside the game. This -should- bring up the launcher. (since that is the program that is supposed to have a file association with sims3packs. If not, it's easy enough to fix that, or just "Open With") Then try to install one at a time.

Additionally, go into Downloads, move everything that has been installed to a safe spot somewhere else, and see if your Launcher was just reading too much stuff. Once a Sims3pack is installed, your Downloads folder is just a backup storage for them. They don't need to live there, and it's better if they don't.

Thank you