Hi ProphetVX
I have used the services of a Chiropractor for about ten years. The term "smapping joints into place" is far wide of the mark.
All of us suffer from wear and tear as we age and this wear is particularly savage in our vertebral discs. The spinal cord and nervous system can be severely "distressed" if these discs and vertebra are misaligned, which can easily occur.
A Chiro manipulates the joints to place them back into alignment, h/she does not snap them. The cracking sound that is often associated with a chiro manipulating joints is actually gases within the joint being released. I know it sounds odd, but I have encountered this phenomenon frequently when having joints manipulated and the chiro has explained what is happening when I have asked.
As stated in earlier posts, a physio works on muscular and soft tissue repair and maintenance, the chiro specialises in skeletal structures. The two treatments are totally different and can have different effects on pain relief. However, if your spine is misaligned, physio will not remedy the problem. It will help you to strengthen muscles to support the spine (or other damaged parts of the body) and ease the discomfort. I can state though, that having regular maintenance of your back and limbs by a chiro can remedy existing discomfort and prevent it recurring, but the maintenance must be regular. Don't stop it once the pain disappears.