why i cannot see all the object i download for sims 3 in the game?

hey, i downloaded some items from "http://www.thesimsresource.com",/ but i cannot see all the items in the games. i only see a few of them. is there a limit to how many items we can add?

and also, i bought some hair from the store online, but i cannot add them. i can see that i bought them, but when i click download, it asks me my password and name. when i do it says error. i don't understand because i am already logged in online.

and does anybody knows where i am supposed to redirect the files (items) that i downloaded in format ".rar"or"zip"? someone told me to open a new folder in "mydocuments/artselectronic/sims3/" and to make a new folder called "mods", to download a file called "Resource.cfg" and unzip it in the folder mods, then unzip all my others items (files) in, and it supposed to work. but it doesn't work at all.

please help. tks