I'll echo the others. Four pages is far too long for a resume. I'd rarely reccomend going beyond one, frankly. The resume is just for a quick look at the person's skills and experience. It should not require a lot of time to read - that makes it look unprofessional and more likely to be discarded entirely unread.

Be succinct.

Summarize your applicable skills using bullet points.

Group related items together.

Separate your name and contact information from the body of the resume with white space - at least a line.

You do not need to include references on the resume itself. A simple "references available on request" line at the bottom is sufficient.

Your cover letter should be brief but enthusiastic. It can repeat/refer to relevant experience from your resume, but just briefly.

Did they ask for a self-addressed, stamped envelope? If not, don't include it. Clutter is bad.

For the interview, wipe your palms on your pants before you go in if you get sweaty hands when you're nervous. Smile, be friendly. Be confident. Say "I am the person you want!" instead of "I really want this job."

There, that enough advice?