Thanks, i have already tried it.
Added Windows 7 with drive letter E: (Windows 8 Installation).
After reboot i see the two entries, but if i select "Windows 8" i get an error (i am currently not at home so i can't say which error) and i need to reboot.
Only the entry Windows 7 is working.
I have installed Windows 7 and installed Windows 8 afterwards.
After booting i got the new Windows 8 Bootmanager Screen, but Windows 7 was not there.
So i installed EasyBCD in Windows 8 and added the "Windows 7" Entry to the bootloader.
After booting i got the textual selection with Windows 8...