Homepath financing and a short sale are two different things. Homepath is a financing and incentive program by Fannie Mae, that can be used on eligible Fannie Mae owned foreclosure properties.
A short sale is when you sell your home for less than you owe on the outstanding loan after having your hardship package approved by your lender.
These are two completely different things that have no direct relation to one another. Can you clarify your question/situation and I'd be glad to try and help?