Kernel Rebuild.

Hi. I am new to the Beaglebone and I have been given an assignment of rebuilding the kernel.
Can anyone tell me where do I start from and what procedure do I follow in order to have it working?

Kindly please help.
Thank you.

Here is a link to the Debian kernel rebuild:

The Angstrom site is under reconstruction, so information is fragmented. I used:

bitbake virtual/kernel -c devshell, etc. on Angstrom.