[linuxfast]

Ah I see
Worth trying to find out.
Short of having a second BIOS which is switchable, I have no idea... and obviously nobody would go to that trouble would they ?

Anyone know how it's done ?

And yeah, I had a oneandone server until I realised my mistake, they had a system like this

Thinking about it, surely it can be done by having a seperate partition with the rescue file system, and a custom boot loader which could be activated by a php script maybe.... but then again, the OS would need to be booting to do that (and thus not requiring rescuing !!!)