welcome to healthcaremagic
scoliosis(crooked spine) and disc problem is already diagnosed in ur case,
and u dnt hv balance.
i would like to suggest u tht u go to meet an physio..
he/she will tk care of ur balance & limping by proprioceptive techniques , stablization exercises(isomerics of quads , hams etc)
and some strenthening exercise that strenthen ur body and facilitate ur walking skills.electrotherapy
modalities are for disc problem & some sort of strtches for ur crooked spine.
ur age is only 42
definitely u can walk again