I was just told by SolarWinds support that Custom Property functionality for the SolarWinds SCOM Management pack would need to be requested here as a feature request.
I am pulling in alerts/events into my SCOM 2012 SP1 environment successfully via the management pack, but in SolarWinds we organize everything by customer properties, so it is imperative that this functionality is added to the management pack so that we can properly organize our alerts and events. I'm sure others have mentioned this as well, so I'm just making sure this idea is heard.
Thanks,
Josiah