Forum:Need Help Modding

I don't know if I am in the right section, but basically, here's the situation I am in: I am trying to mod my save file to have custom weapons on it. I extract the file to my pc with Modio, then I edit the file with WillowTree#. After I make the desired mods, I save my progress. Here's where the problem comes in: When I go to Modio to rehash/resign/save the data, it seems to save just fine, but most of the mod items will not show up in my character's inventory. What is going on here? Please help. Also, my gamertag is HellHound 86, feel free to hit me up sometime if you want to co-op for a little while.