Actually you can remap M4 to accept V4 textures using the free UV mapper Classic.

After you download and install UVmapper classic, load the V4 obj into UVmapper create the UVS and save it to a folder where you can locate it. 

Load M4.  Apply the saved V4 UVS to M4.  Save the remapped M4 obj with a new name in the same folder the other geometry is in.

Open up the cr2 file for M4 in a text editor.  Change the obj file name in the cr2 to the remapped obj.  Save the Cr2 under a new name to you don't overwrite the original. 

If everything is working, you should be able to load the remapped M4 via the cr2.

If you don't want to go through this, search the DAZ forums, remaps were done when M4 first came out.

Also M4/Mina sold at DAZ has a remapped figure of M4 that accepts V4 maps as well.