This is pretty awesome. I saw it on HBO today.
It's a program called Vanity that allows you to play around with the armour sets from Reach to find a combination that suits your taste and it'll tell you how to get there in the game. I completely forgot about Veegie after HaloMods went to hell.
Source: http://veegie.com/Vanity/
I encourage you guys to read the FAQs section so you can fully appreciate what these guys are doing. There are a few bugs and exclusions, but for what they have done so far, it's pretty amazing. You can also save a PNG image of your final outcome, sort of like that Halo 3 armour program of this same sort, except this program is extremely high quality.
Edit: The the exported images are surprisingly high quality. Here's a quick random one I made:
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