Seriously speaking I think what your friend's company is attempting will be a no go. I mean it's cool and everything, but companies give artist "Endorsements". These companies pay celebs big bank to wear and model their product.
On top of that the companies break off a percentage of all sales to the artist / model / movie star etc etc...
Even if Snoop was to agree with it, his manager will make the final call for Snoop (and see if it's in Snoop's best intrest to mess with your friend's company. In other words make a few millions off it).
Other things to look at. Everybody claims to have their own company etc ect, but only a handful have an actual company running legit. Everybody else is just word of mouth with no distribution or any real budget other than broke.
On a different note, let's say you got the shoes to Snoop and you took a picture (natuarally). You would then turn around and use that as advertisement for that shoe / style / your friend's company, but know that Snoop or Snoop's people would turn and sue the shit outta you. Now, you may tell yourself, I have nothing they can take. Well, trust me they'll sue and put you in debt for the rest of your life.
You can't just tell everybody on here it's a gift from the kindness of your hearts. You and your Homies all have a roll to play in this and are all looking to bank off it. I can understand that, but before you can do all that you need to have all your I's dotted and T's crossed. As far as the shoe design / style / color (s) having gone through copyrights just incase Snoop wants to steal your idea and make it his own. You need to cover all bases.
I'm just being real with ya Homie, not hatin'.
Good luck though.