Here ya go...
Step 1. Choose a color of RIT dye, you can get them at most arts and crafts stores
Step 2. Takes liners out and clean the shells
Step 3. (this is when improvisation comes in)What i did was start boiling 3 pots of water at a time until i filled a plastic bucket that could fit both my boots in it, With the final pot of boiling water, mix in the RIT dye, and add it to the rest of the water and stir it around a bit. Put the boots in, the more time, the darker the color, i did mine for about 22 minutes.
Step 4. Takes the boots out and rinse them with cold water until the water runs clear.
Step 5. Let them dry, put the liners in, and be a baller.