Post burn plastic surgery procedures

An accident last year in August caused severe 2nd degree burn injuries to my wife (who is 30 years old) on 90% of her TBSA. She remained hospitalized for around 4 months during which she underwent several skin graft surgeries, most of which were for her arms, hands, shoulder, and legs. At the time of being discharged from the burn unit she developed calcification in both of her elbows which were operated on later (in around March and May of 2009) which have now restored her elbow movements almost to 90%. Also after being discharged from the burn unit she underwent physiotherapy for around a year and also used full body pressure garments as advised by the doctors.

Currently, she has the following main problems
1. She has developed a contracture under one of her legs at around the knee area because of which she not able to flex or bend her leg completely. Even though she is able to walk, it does create a hindrance and is at times painful as well.
2. Similar contractures have been developed around both of her shoulders and upper arms
3. And lastly the scarring on most of her body which is a lowering factor to her self esteem. The upper limbs are the worst effected part with scarring, even though other parts also have these scars of various degrees

My questions are as follows:
1. What are the options and treatments for the contractures and what are the expected outcomes of those treatment?
2. What are the possible treatments and procedures for the scars? Is it possible to minimize or remove scars through surgical or other medical procedures?
3. In your opinion, what would be durations for these procedures? Meaning, how many years should we expect would it take if we opt for these procedures?
4. What kind of expectations should we have for such procedures?

I would really appreciate your response and guidance.