As noted above, I had a few setup issues with Superman. Here they are and how I was able to work around them (you'd be wise to have someone assist you and hold the base/body as you try to move other parts):
1. Insertion into base: The feet were initially levitating above the ground so I SLOWLY and diligently removed him. The peg in the lower foot is large and simply rubbed it with a rubbing alcohol swab/pad...this made things significantly better.
2. Installing the cape: Oh Lord...scary stuff for me. I felt like I was playing a game of "Operation" with this and very concerned about the red cape paint rubbing onto the flesh of the portrait head. Assuming I'll display the regular portrait the majority of the time, I practiced with the EX head, but covered it with a handkerchief. Then I bumped the uncovered hand...left a red mark. After testing on the bottom of the EX head, the same rubbing alcohol swab/pad removed the red from the hand (I'd use very sparingly)...so I then covered Supes with another handkerchief. Here are pics...I simply "tied" him with taping the edges together...nothing attached to the PF itself.
I installed and removed the cape three times so I felt pretty comfortable maneuvering with the regular portrait. Once the cape was on top of the handkerchief, with the help of additional hands, we slowly removed the handkerchief.
He looks great but I'm honestly very leery of ever taking the cape on and off again. Plan ahead and be very judicious.
3. The shoulder hole for the cape peg doesn't seem to be deep enough. At first, I thought I'd drill/shave a bit to correct it with a dremel tool, but after the stress of putting the cape on without scratching paint, I think I'll call it good enough.