IHDA's programs can be used for FHA, Convention and VA loans. You should be able to, but the best person to ask is a lender who has experience with both programs.
If your lender believes this can be done, there are a couple things to keep your eye on once you execute a contract.
1. Whether it's Homes for Heroes, Building Blocks, Smart Move or and other downpayment assistance program (DPA) administered by IHDA, IHDA requires that the seller and purchaser sign their application and that a notarized original be delivered back to IHDA. This should be started as soon as you have an executed contract. Communication lines from Fannie Mae can be challenging, and getting them to understand why you need an original notarized document, as opposed to a fax or electronically signed copy, may take a few attempts. The can provide it, but with the workload FM asset mangers and attorneys have, bandwidth is limited, and they only do what's required to get the deal done. Getting financing extensions on transactions with Fannie Mae can be touch and go, and if this document is delayed, IHDA may not clear the DPA funds in time to meet your mortgage contingency deadline.
2. Homepath renovation has a lot of moving parts. Make sure that you are with an experienced lender, and that the lender clearly outlines what you need to provide to them to get your file through underwriting in a timely manner.
Hope this helps, and best of luck with your search.