Answer 1: Yes it's fine It's fairly normal to ask someone to proof -read your resume or to help with layout, so there's nothing wrong there. There's so many resumes sent out with elementary mistakes, so another set of eyes really helps in getting things right. If the recruitment is happening via an agency, the hiring company won't see your resume, they'll just see a copy/paste of the relevant parts (recruiters won't want the client seeing your contact details). In general, it's far more important to get the facts right than for it to look pretty.
Answer 2: Is it acceptable to format a cv for someone else? Yes, of course. I help friends write and format their resumes all the time. Nobody knows or cares who wrote or formatted your CV/resume. They only care that it accurately reflects you, your background, and your career. I can't imagine that an interviewer would ask about a nice resume. But if they did, saying "Well, I had a friend who is really good at it give me a hand. " is a perfectly acceptable answer.
Answer 3: Yes , its fine to help someone with their resume/cv. I have been complimented on my resume for its format and such in the past, but never has an interviewer asked how I came up with it. It is very low risk in my opinion to whomever your helping. In fact, there are several companies who make a living by creating resumes for professionals at all levels. Their resume is the first step, the golden ticket if you will, to earn the interview. I would do whatever I felt necessary to make mine as solid as possible. Formatting and content both matter . Think of it as their first impression with the potential employer. Do what you can to make is as good as it can be.
Answer 4: Just to go against the grain... It can possibly be a problem, IF. You use words or phraseology that the person doesn't normally use You embellish The person cannot recite it from memory. If he doesn't know what's on his own resume, that's a BIG red flag It doesn't "fit" the job applied for. You want your resume to be fine tuned to hit the requirements of the job for which you are applying. To avoid this, make sure you go over the CV as you are making the changes, and the person understands them and can go over it with you line by line and memorize it. Edited to add: To expand on my point #1. If I am interviewing someone and the language at the interview doesn't match what I've seen on the resume, it's going to make me think that something is wrong, that I'm not interviewing the same person I saw on the resume.
Answer 5: It is absolutely acce