J.C. Hornbeck explains how to create monitor for text and csv files in SCOM. Just read it on the link below. It’s pretty easy with SCOM.
The Hyper-V Management pack provided by Microsoft is very good management pack but it has some disadvantages like offering only basic rules and monitors for Hyper-V. If you looking to extend your Hyper-V monitoring in SCOM 2007/2012 there is solution. You can find in the CodePlex community website. Click on the link and download.