Found these link on the Mgmodularv Yahoo group, posted by Stephen Rivera.
"Using The Mg Synthesizer"
http://arts.ucsc.edu/ems/music/equipment/synthesizers/analog/Mg/Mg.htmlBrief descriptions and general how-to info about the modules in an actual hardware Mg (belonging to UCSC, a smaller-scale version of the Modular V). Pretty useful stuff, interesting to compare the similarities as well as the differences between the hardware and software versions.
There is also a more general analog synth article here (reprint from Sound On Sound magazine):
http://www.synth.clara.net/modulars.htmlIt's long, contains no pictures and does not focus on the Mg, but it does a good job of introducing the reader to the general ideas and concepts of analog synthesis and synthesizer programming.