Exclude vm object from logical disk alarm

So i have set up a three phase alarm for logical disk, this is applied to all virtual machines.  i need a way for me to copy this rule and modify the default thresholds, then i need this new copied rule to just include one virtual machines logical disks.  how can i do this?  i already went down the services avenue but that won't work since i use attributes to create the services.  it just won't work the way i need it to.  so the easiest way is to create a copy of the rule, apply it to the specific objects.  i then need to modify the orginial rule to exlude that same object.  please help....