Etherboot in the BIOS?

[Andrew Sterling Hanenkamp]

According to the FAQ, it's possible to boot Linux using Etherboot with 
LinuxBIOS.  This appears to be a pretty simple and straightforward 
process, but I was wandering if it were possible to render the system 
unbootable?  That is, is it posible that overwriting the BIOS will cause 
boot to fail (because of misconfiguration, etc.)?  If this happens, is 
there anyway to recover?  What are the pitfalls and how can I avoid them?

The idea of overwriting the BIOS makes me a bit nervous, but the 
potential benefits of this boot-up process could save us quite a bit 
when it comes to configuring our clustered systems.

Thanks,
Sterling