So a couple things about that.
1. Those utilities are used by F5 for F5 products. Providing links to such things here from alternate sources would not be legal, and unfortunately, would constitute piracy, which is explicitly not allowed on these forums.
2. As I mentioned previously, you don't need the image2disk utility. That utility explicitly does not work for installing 9.x code.
3. Why are you using 9.1.1? You should not be installing a back revision, especially if you're trying to install restore config. But you may need to open a ticket to F5 Support to get code revisions that old, as they usually take the out of support downloads off-site.
With either 9.x version, you should be using the ISO image you downloaded, going into it, and using the umdinstall.exe utility in the Windows Folder and creating a USB Drive specifying the BIG-IP system it's going to be installed onto. You then connect that USB Drive to your Big-IP unit, and connect via Serial so you can see the prompts. That's where you should be able to select Install, where it should format the drive and install the software just as if you were installing an old Linux distro on a generic computer.
Again, you shouldn't need image2disk. You cannot install 9.x code alone using image2disk (though you could install 9.x as a secondary image after using it to install 10.x or later.)