hurler's syndrome

Hi, I'm treating a 5 year old kid with history of delayed milestone. His pelvic stability is in pretty bad shape. Right now he stands and walks with support. He also shows features of attention deficit. His history is very unclear, partum history was uneventful with normal milestone achievement in the first year. The kid is then supposed to have deteriorated. His CT reports are normal, shows mild nystagmus on lateral gaze, no signs of muscular dystrophy or myopathy.

My questions are can attention deficit result in motor impairment? if not what can I diagnose the child to be? If the problem of AD is addressed with medications after referral to a psychiatrist, will there be a better motor control? Can I name cerebral palsy coz it's a growing brain? and I need some suggestions to improve his pelvic stability.