So, you can't boot to anything right now?
EasyBCD is not yet aware of Windows 8. Since the booting scenario has changed with it, there may be problems when using EasyBCD.
Have you disconnected and reconnected or changed the Hard Drive priority in the bios?
You may need to disconnect the other drives and just get your primary OS working using a Startup Repair.
If you were able to get one system to boot, you might be able to use msconfig.exe to set the boot order. If you loaded things correctly, the boot files should be in the Active partition on the primary drive, or System Partition.
If you can get into an Administrative command prompt, you might use the following command and then use the snipping tool to take a picture of the entire readout, and you may have to extend the window. Attach using the paperclip on the Advanced Replies page.
bcdedit