This process really all depends on what are you trying to monitor? The MIB OID's supported by the Netgear can be plugged into the Orion UnDP (Universal Device Poller) with or without SolarWinds compiling the MIB file.
Typically the way I approach this is that I will use the MIB Walk tool in the Engineer's Toolset to show me what is supported on the device and then export that to Excel. I can then search the form in the OID descriptions for the value I'm looking for (VPN Connections, port values, etc). The tool exposes the OID and the raw value polled durring the walk to help identify the value. You can then copy and paste the OID back into the UnDP of Orion and set up the poller.
The advantage to having SolarWinds compile the MIB (which you would have to ask Netgear for) is that it makes the set up process easier in the UnDP and it also makes it easier to validate that you are monitoring the correct OID. The definition from the vendor can be reviewed using the SNMP MIB Browser tool in the SolarWinds Engineer's Toolset if the MIB file has been compiled (which based on experience, most MIB files have been if it's been available to the public for any length of time). The UnDP will use the information from the MIB file to help automatically configure the right settings for the poller, but this can all be manually configured too.