Okay, I stopped being lazy and put some more work into this. And it's complete now. Or at least as complete as I'm getting it. Now in Texture Pack format.
Download - http://dl.dropbox.com/u/71356504/MegamanFinal.rar
Extract the folder and place in steamapps\common\a valley without wind\RuntimeData\Texture Packs
Run the game. Under Options-> Graphics, there will be a Texture Packs Option. Select Megaman Final and click the Save button.
It replaces four different characters from the Industrial Revoltion (Mostly because I liked their stats best!)
Raya - Megaman X (From Megaman X 3)
Raya2 - Megaman Zero (From Megaman X 3)
Samantha - Megaman X in Upgrade Armor (From Megaman X 1)
Samantha2 - Sage Harpitula (From Megaman Zero 3 on GBA)
Samantha and Raya Ghosts - Cyber Elf (From Megaman Zero on GBA)
The animations aren't 100% perfect, but they're about the best I'm going to manage without pulling my hair out. The hitboxes will be slightly off as the Megaman sprites are a decent bit bigger than the Raya and Samantha sprites are, but it doesn't affect gameplay all that much. And yes, Harpitula flies instead of walking, like he does in the game.
I'll try to post some screenshots later.
PS: Thanks to Arturia for showing me a decent format to post this release in!
EDIT: I'll have to do some touching up later on Harpitula. I missed a few stray pixels. And when he's flying up a slope, it looks like he's going face-first into the dirt! Whoops!