You can use the mesh for the grass and another textures, make them entity objects with a fpe file and then use the spray mode. They are not animated, as I tried using the vegetation shader on them, but they shadowed and looked great.
So you could use the terrain paint grass for animated grass and have different patches of sprayed grass mixed in with it. Would look great. An easier way will be included in the future.
Intel(R) Core(TM)2 Quad CPU Q6600 @ 2.40GHz, 2400 Mhz, 4 Core(s), 4 Logical Processor(s), 8gb RAM, Nvidia gtx660, Windows 7 Pro 64bit