Hello,
 
I was wondering if anyone knew if it was possible to show properties when right clicking a my computer icon in RocketDock?

I don't know about it and I don't think rocketdock has any option for including that in the menu.If you use System-Properties that much then you can create a shortcut for it on the dock.Just add a new item to the list and go to its "Icon Settings", in the target field, type 'sysdm.cpl' , choose an appropriate name and icon for it and you are done

Thanks for the information.