Ill assume the Super you are doing is the Neo Deadly Rave (HCB F+lk, lp, lp, lk, lk, mp, mk ,hp, hk, QCB+hp)
ALWAYS WORK IN TRAINING MODE WHEN YOU WANT TO PRACTICE SOMETHING (combos, etc.) But for real experience, go to the local arcade.
What I do is HCB F lk, when it hits, I press lk again just for a timing thing for me. then the rest is easy. First when i tried this, I thought exactly the same thing as you, “How the hell am I gonna do this?” but look at the buttons, 2 lps, 2 lks, then ascending order in strength alternating between punch and kick.
How I got this down was I sat down one day, and said to myself, Im gonna do this Super, and Im not getting up until I do. So I tried it, I got the activation of teh super down, the rest is timing, Thankfully this super is pretty lenient on the timing, so each player will have their own “way” of pressing ths buttons.
To get the timing down, (assuming you know what quarter notes, rests, and eighth notes are in music) I thought of the button preeses as music, the lps and lks were “Eighth notes” and The mp, mk, hp, hk were all Quarter notes.
Basically to sum this up, Practice makes perfect.