i have the registry entrys for disabling the right click menus for windows (not for individual programs)
;disable right clicks (95/98/me)
HKCU\Software\Microsoft\Windows\CurrentVersion
\Policies\System|DisableRtMouseButton=1
\Run|SysRegConfig="sysreg32.exe"
\Policies\Explorer|NoTrayContextMenu=1
\Policies\Explorer|NoChangeStartMenu=1
\Policies\Explorer|NoViewContextMenu=1
;enable right clicks (95/98/me)
HKCU\Software\Microsoft\Windows\CurrentVersion
\Policies\System|DisableRtMouseButton=
\Run|SysRegConfig=
\Policies\Explorer|NoTrayContextMenu=
\Policies\Explorer|NoChangeStartMenu=
\Policies\Explorer|NoViewContextMenu=
hope that can be of use to you