Hello,
I will try to save you a money...
Go to extention manager/plugin manager...then type "editor" in search bar, then choose "Editor - TinyMCE"
Then down you have section "prohibitet elements"..erase all , just leave "applet".
save and close...then you will be able to have java, php etc in your articles, modules...
Cheers,
Milos
PS. If you still need help, then hire me. :)