booting from diskette

[.VWV.]

Greetings to all from Europe.

I would like to know, the data necessary to make a loader diskette 
similar to the one used for booting FreeBSD, useful to boot with the 
same loader the Windows system.
In other words, I would like to know what kind of operation does the 
FreeBSD loader on the MBR, in order to boot Windows.

Thanks, please CC me

VITTORI