I also used A 1200. It took two years ~ I played for two years. Are you talking about MPKG? You didn't brush the machine, and the installation of MPKG was restricted. Only signed software can be installed. As far as I know, only Xinyi Guardian can install software on the machine without brushing it (because it is signed). You'd better brush the machine, which can install all MPKG software! The process of brushing the machine is actually very simple. As long as there is no sudden power failure, it will not be brushed to death.
By the way, recommend a forum of A 1200, where you can learn more.
/n club/board display-3422- 1 . html