MediaCodeSpeedEdit, mod and dvrflash?

What do MediaCodeSpeedEdit, mod and dvrflash expose to achieve?

I read a little bit about them but still really dont understand
Whats the binfits and should i use them ?
I have a PIONEER DVD-RW DVR-106D FW 1.08
Thanks

MCSE does not work with your drive, DVRFlash allows you to flash between 106 firmwares and flash rpc1 to the drive etc

Thanks