What You'll need:
Altoids Can (preferably empty)
Foam (this will pad your iPod and keep it safe)
Duct Tape (I used this more as a finish to put on the foam)
X-acto knife (useful for cutting the metal, duct tape, foam, etc.)
Something to punch the headphone hole with (I used a nail file on my pocket knife)
Step 1: Cutting the Foam
Step 2: Try Out Your IPod
Step 3: Punch the Headphone Jack Hole
Note: Make sure this hole isnt too big because the headphones help to hold the iPod in place, so if your jack moves, your iPod will bounce around. My hole fits snugly around the plastic beginning of the wire.
Step 4: Cut the Lid to Fit the Hole
Close the case without anything in it and mark the part of the lid that overlaps the jack hole. Cut it out leaving a couple of mm around it so your headphones can make a good connection with your iPod. This is important because otherwise the lid wont close and your iPod could fall out.
Note: you might want to push the metal against the wall of the inside of the case so that the headphone jack and the iPod will connect all the way.
Step 5: You're Done!
Anyway, hope you found this instructable helpful and if you have any questions leave them in the comment box or send me a message and I'll help.