Mine? Just unpack them into your HUD folder in the game's directory. If you have the complete PSP mod (see the Hawkeye how-to threads for instructions on THAT) installed, they should automatically be used by the game. This, of course, excludes the Moon Knight portraits (which require the Moon Knight/Colossus mod to be installed) and the Deadpool one, which works in any case.
It would also be prudent to back up hud_head_1702.igb
(the incorrect, but official, Dead Man Wade portrait foolishly used in conjuction with Ultimate Deadpool's outfit) before you do anything.
It occurred to me that the portrait images could actually be IMPROVED...why not replace them ALL in the game with some sweet BUST SHOTS?
Only if the contrast of the pictures is okay, which automatically rules out the Black Widow one you suggested (sorry). And I've already got neat Punisher art laid aside for later use, once we get to crossing THAT bridge. Can show it to prove it's good enough
Same goes for Iron Fist and Vision while we're at it.
The Hawkeye and Mar-Vell ones look slick though. I'm gonna try working with THOSE