I have written a few blogs on this subject that may be helpful. You can find them by looking in my blog section. HomePath is a loan program from Fannie Mae that is offer by Mortgage Brokers and few Banks. The program is only available for Homepath listed properties which can be found at http://www.homepath.com.
Minimum credit score requirement a 620. Also you cant have any mortgage related late payments in the last 60 months.