you could skip the SNMP and use another program who can make graphs from these values. all you need is a simple putty script that will get this number from another computer, and from there you could use it wherever you need.
so your saying use a putty script to ssh into the mt box, grab the number from the print command, then graph that?
good idea
is it a crazy feature request to be able to assign a value to a user created oid? so a script can be run every few minutes to set the value of the custom oid, which can easily be read?