OK....I thought about it and I guess I will try to help you repair it.
But first I need to know a few things!

1) Did you make a back up of your system before you attempted this?
2) Do you have legitamate copies of the operating systems you are trying to dual boot to?
3) very important to number 2 above......Is the copy of the vista operating system you downloaded the same as what is installed or do you even know!