Since it is just a 16" tire, take it to ANY of your locak tire shops and have them re-moint it. Because getting the bead back on is a PITA and only half the battle. Once it is on, you have to get it to take air ad seat the bead. Which is another PITA with just a small compressor.
Tire shops around me only charge $10-$12.50 per tire for a tire swap and re-balance on a car. Since no balance is required, and jsut one bead, it may be even cheaper than that. And even for $10, it just isnt worth screwing with for hours tryint to do it yourself and chancing screwing something up.
And also, a tire shop, if you ask, will probabally take the tire off and clean the bead and make sure their isnt any dirt around it that will cause a slow leak.
I have broke down and re-mounted tires before with the tire spoons. PArtly because I am cheap. Everytime I am about 1 hour into the job and fed up, I always ask myself why I didnt just pay the $10.