Snarlygribbly's Scenefixer (free) creates delta INJ/REM files That utilize channels in the figure (eg, the Daz community channels in V4), you will be presented with a choice of channels that are available in the interface...

http://snarlygribbly.org/3d/forum/viewtopic.php?f=8&t=13&sid=8cc8133162c70d6fdff12debf6cb6849

You can also do some rather simple text editing and create PMD INJ files which do not require the use of these channels but requires that you do some file hacking and have the big bad bogey of "Use External Binary Morph Targets" enabled in preferences in order to generate a .pmd file (this is only necessary during the creation process of the INJ, end use need not have UEBMT enabled). Nerd3D has a tutorial on this...

http://www.nerd3d.com/modules.php?name=Content&pa=showpage&pid=13

Either of these methods works fine for personal use, if you intend redistribution of proprietary morph data derivatives things become more complicated as you do not want to violate intellectual properties or licence laws.