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Hello,
I am trying to use BOOTBOOT as the bootloader in my operating system now. I wondering if anyone knew how to install BOOTBOOT to an MBR , BIOS boot disk.
Thank you for your help.

There are instructions. Which part is causing trouble for you?

Short answer: I don't want to sound rude, but RTFM.

Long answer: for existing disks, copy bootboot.bin to a defragmented FAT partition, then run mkboot. To create an entire disk image with all the required files, boot partition and MBR, use mkimg.

Cheers,
bzt