On doing a SecondLife Rig

what would be needed to create a SecondLife compatible Rig for MakeHuman?
http://coadey.com/simplebot_blender26.zip has a copy of a known working SL avatar but what else would be needed??
one big difference is an SL rig has the hips as the root
http://coadey.com/simplebot_blender26.zip has a copy of a known working SL avatar but what else would be needed??
one big difference is an SL rig has the hips as the root