Hit some local aquarium shops and buy at least 2 females (3 or more would be better). Look for more rounded anal fins with out eeg spotts on them. (please note that this is not a 100% positive way to identify females) Put the females in thier own aquarium and feed them heavy multiple times per day and do partial water changes at least every other day for about two weeks. THese are algae grazing so include spirulina in thier diet. After a two week conditioning period, introduce the male into the females aquarium. He should spawn with at least one of the females with in 48 hours if not more of them. Remove the male after a couple of the females are carrying eegs in thier mouth, I personally would strip the fry from the females mouths after 14 days and raise the fry in thier own aquarium with a "fry safe" filter like a sponge ilter for example.
THey are pretty easy to spawn and fun fish to raise...good luck
Joel