Okay, I got the apps back on there. (it was a different method for me but the info helped. My tablet has 2.2 on it) but now I cant add any apps to the app home screen. I can add widgits but no apps. I can add apps to the app drawer though.
That's one of the limitation of the stock launcher. You can only add widgets to the home screen, and apps to the app drawers. You can't add anything to the Search screen.
I switched to Go LauncherEX, which is MUCH more configurable, and easy to install. It just replaces the the stock launcher. After installation, you will get a window popup when you tap the Home button, asking whether you want to use Go or Infotmic. You can select either, but if you check the "always use" box first, then you won't be bothered with that popup in the future.