location of msaccess.exe in Office2007 Enterprise Edition

I have always found the Microsoft Access executable in the folder “C:\Prog…\Microsoft…\Officexx\”. Now,I have one instance on a computer running Office 2007 Enterprise Edition, where opening Access from the “Start Menu” works fine but I cannot locate the specific executable (msaccess.exe) anywhere on the machine to use in the “run” command. A different computer running “straight” Office 2007 has the msaccess.exe file in the normal place. I need to be able to shell out to the executable to run some external programs but am unable to do so. Does anyone have a solution ?