That's exactly the video I used to install the mods, but when I started it from Frosty it told me the game was starting from another path or that it needed administrator rights which Steam and EA have.
Do you run Frosty and Frosty fix as administrator too?
Yes. Always.
I can't say why your Frosty mods don't work.
Might be the easiest to clean reinstall the game (Make sure that the entire game folder is gone) and start from scratch.
Make sure the Frosty mods work before you attempt to install DAI mods.
