I am in charge of halter training a yearling whom does not want to be trained. He is affectionate and curious but will run if I try to approach him. He was previously roped and haltered but the training was very incomplete and the result is that he now fears ropes and halters. The other day I corralled him in a side pen and tried to work with him but as soon as he was separated from his heard he shut down and ignored me completely. He worked himself into a lather running back and forth calling for his friends (whom seemed happy to be free of the little nuisance). After an hour of this he tired and I was able to touch him using the approach and retreat method which spiked his curiosity again.
I am working with this colt as a volunteer since his owner is ill, and so I can only spare about 2 hours twice a week with him. Are there any techniques to go about halter training that would work best in this situation? I would rope him but i'm afraid I won't do it properly and will end up with a colt running around with a rope dragging behind him. I've also thought about laying him down to build some respect and trust but I would need a halter on him first.
Any suggestions or experiences would be appreciated.