Windows 7: Unbootable after W8 install

I installed the W8 Dev preview and now I can't boot into windows 7.



Notes:
-I replaced the boot stuff with a custom bootscreen before using Windows 7 boot updater, so if I need to restore those to default, I will need all files it replaces (excluding bootmgr, as that was edited with easybcd)
-I can't boot into Ubuntu on its own partition (it says its not found when I try to go to it from the windows bootloader)
-Windows 8 is the only OS that boots

And I don't have a backup CD, so if possible, is there a place I can get a copy of a restoration CD for Windows 7 HP x64?