I discovered a way to remove the limitpitch and the limit zoom in vanilla.!
Place the 'unlockscreen.cam' in the scenario folder.
And place 'uieditormenu.xmb' in the data folder. (make sure there is no uieditormenu.xml in your data folder)
Place the 'ui load camera.ddt' in the textures\icons folder(only if you have the default editor)
Don't replace the uieditormenu.xmb and ui load camera.ddt files if you are using the New Editor or you will lose the New Editor menu!
Download 'The camera pitch unlock file for the New editor 95' in the miscellaneous files section if you are using NE 95.(make a backup first)