-(이)라면 puts a condition on a noun — 'if it is X' — and 하다 says that in that case you would go ahead: 회사를 살릴 방법이 그것뿐이라면 해야죠 (if that's the only way to save the company, then it has to be done), 그런 분위기의 가게라면 해요. 위해서라면 is the emphatic version, 'if it's for the sake of that, I'll do whatever it takes'. One line here is a coincidence rather than the pattern — 모모라면 is a shop name that happens to contain the word for instant noodles.