Follow step 2 above in the default skin section.Install Rez Delnava’s UI Mod – this will allow you to use non-default skins.Your new default skins should be working in CAS. Go to your My Documents > Electronic Arts > Sims 3 folder and delete the simCompositorCache.package* file, don’t worry – once you run the game it will ‘respawn’.Your resource file should also be put into the Mod directory if you are using this method. For later patches (after 1.12) and ambitions the packages directory is now located in My Documents > Electronic Arts > Sims 3 > Mods > Packages. If you have installed helper monkey you just have to double click on them and they will be put in the correct directory.
For the basegame and older patches this is the Program Files > Electronic Arts > Sims 3 > Mods > Packages directory. package files into your packages directory. package format then you don’t need to do anything to them as they are ready for use. Extract them somewhere you will be able to find them, such as the desktop. Once extracted you will have files that are. rar files you need to extract them using winrar or something similar.
You can find Delphy’s framework installer tool here. This assumes you have installed the framework needed in order to use. Some people have been having trouble installing my skins so I thought I would make this quick guide on how to install them.