monitor linux-server with net-snmp na lm_sensors

Hi @all,
I'm running a Linux-Server here and want to monitor this machine with OpManager using the SNMP-Agent provided by the Net-SNMP-Package. All basic Informations such as CPU-, Memory- and Disk-Usage are displayed properly. The only problem I have is I want to monitor M/B- and CPU-Temperature. So I uploaded the lm-sensors MIB I've found and tried to create a custom monitor. I can monitor all temperature-sensors together with one monitor but I'm unable to create a monitor for each sensor, because OpManager always adds a 0 to each OID in the Monitor. In the MIB-Browser I can access all sensors-values separately. I have to do this because the machine reports three temperature-sensors but physically has only two. the third temperature always reports values around 4.0 * 10^9 �C. Does anyone know how I can solve this?

Thanks a lot.