When I did a reset, most of the apps re-loaded by themselves. If you've done a backup I think it will attempt to reload each app in your purchase history. (There were a couple that didn't work because I put a Samsung app on my HTC phone, and one or two apps no longer existed at the level in my purchase history, but the rest loaded.)
About all I had to do was sign into my email accounts and rearrange my tiles back to the way I had them before the reset.