The belt that drives the blade came off on my Murray 405000X8F came off. Does anyone know how the belt should be threaded?

Put the flat back part of the belt to the flat sides of the pulleys, and the v side of the belt to the v shaped pulley. Watch for belt guards and be sure you are inside of the guards.

The belt that drives the blade came off on my Murray 405000X8F came off. Does anyone know how the belt should be threaded?
Try this link for a parts diagram -
Lawn Mower Parts | Emergency Preparedness (http://www.ordertree.com/ModelInfo.asp?Final=1&SiteID=1&Mfg=63&Model=405000x8F+Lawn+Tractor+%282005%29)