CCS/MSP430G2213: How to use UART Bootloader

Part Number:MSP430G2213

Tool/software: Code Composer Studio

Hi !

I am trying to understand how the Bootloader works, and I have several questions.

• the Bootloader is integrated in a protected memory (ROM or FLASH) in MSP, I can communicate with it using the UART protocol. it is correct ? 
• is it me who must ensure the BSL Entry Sequence or I can do that automatically in the code ? and if I'm in the BLS mode, I can start sending the data to the BLS by following the Data-Stream Structure (HDR, CMD, L1, L2, .... ACK).
• to change the contents of the flash memory of an MSP by the BSL, I must imperatively make the BSL Entry Sequence in this MSP? and if I want my MSP to change the flash content of another MSP (i.e I want to swap the data between two devices) ?

I hope you will answer me to discuss the solutions and ask another question.

Thank you.