Originally Posted by SmG67
If the apps you install are not compatible with the android version you're using they won't show up. The quickest way to check this is to doubleclick the .apk on the sd-card and see if it will install.. They will be in your user/app if they do, but you can move them from there to /system/app if you want. If they give an error when installing they're not compatible.
They are compatible with the Androidversion, that much I know.
But they will not install if I doubleclick on them. That didn't work with another rom either, but it worked installing them using Root Explorer.