While perusing some Linux stories today, I came across a reference to using SBM, Smart Boot Manager. SBM runs from a floppy disk and allows systems to boot from a selection of disks, effectively allowing one to bypass an old BIOS and have more advanced boot options.
From the SBM site:
"Smart BootManager is an os independent BootManager which has easy to use interface and many other features. The main goals of SBM are to be absolutely OS independent, flexible and full-featured. It has all of the features needed to boot a variety of OS."