German microphone manufacturer Schoeps has .pdf application notes online, describing standard approaches to live concert recording for 5.0 and 5.1 surround audio.
Focusing on the OCT front system (Optimized Cardioid Triangle), the notes also display rear-channel and low-frequency material. Included in these notes are methods to properly mount the microphones for different surround configurations.
For more, visit www.schoeps.de.