I am working on upgrading tSM 4.1.1.0 to 4.2.1.15. I've aix 4.3.3.0 platform. 
As I understand that I've to upgrade(migrate) to 4.2.1.0 level first and 
install upto 4.2.1.15 level. I'd like to know if you have any procedure or 
experience that can help me to accomplish this job. Thankyou.