CC

[sim323]

For installing sims3.com(directly from TS3.com) CC:
1.First off, Download what you want then open up the sims 3 launcher go to the downloads tab and click install.
2. Make sure the deactivate Custom content button is UNchecked (if you haven't even realized the button then don't fret over looking for it)

For installing OTHER(hair,mods,cloths) CC:
1.Install the helper monkey Installer Monkey
2.Download whatever you want from whatever site
3.When the download is complete double click it and the monkey automatically installs its for you

Where to find hair.
1.Just go to a site such as peggysims or rosesims and download hair but if you see hair that you want but costs money just look for it under Pay site myst be destroyed

Hope I helped