I run Vista Business x32 on my host and had VMWare Workstation Version 6.0.0 Build 45731 and installed Build 55017 Yesterday.
I went from being able to turn my Guest OS's on and press the ESC key and change my boot orders to NOT being able to do so because the bios flashed by so quickly.
I looked around and found a thread that said others had problems with this with some versions and the fix is to unmount some hard drives out of the Guest and it was easier to hit ESC.
That "workaround" is unacceptable considering the amount of boot orders I change (probably 5-10 a day depending on the work I'm doing) so I uninstalled 55017 and reinstalled 45731 and am again able to change the boot order.
Allow me to echo the request of others and make the "BIOS boot time" a configurable item, thank you.