What to do when the system beep of a VMware Guest OS is a pain in the neck?
Disable it with mks.noBeep = "True"
But there are different places where you need to put it in based on the Windows VMware version.
VMware version up to 4.0: Add it to your guest .vmx file
VMware version 4.5 – 5.5 and Player 1.0: Add it into the config.ini or preferences.ini files. This files are located at X:\Documents and Settings\<current user>\Application Data\Vmware or X:\Documents and Settings\All Users\Application Data\Vmware\<VMware Version>