Hi,, Redave 
about clothing,, actually not need to change obj to triax figure first.^^;
(before I thonght same thing,,, but not need,,)
just import obj to correct positon on genesis, then use transfer utility,
the obj change the clothing for genesis.
of course,, if want more better fit clothings for many poze or many character morph,,
need to adjust weight map , of make morph for each shape,, etc,,
or need to buy Optitex clothings,, or other soft ware,, (dynamic clothings,,)
but basically,, it can change obj to basic clothing for genesis. which can follow genesis rig and movements,,
and may follow other genesis morph shape too.
lucky for me,, there were already documents about rig clothing for genesis
(I do not know how to make clothing for other generation figure at all ^^;)
http://docs.daz3d.com/doku.php/public/software/dazstudio/4/userguide/creating_content/modeling/start
about the basic steps (how to use transfer utility or morph loader pro,,)
for making simple clothing for genesis, and morphs ,
it may help,, (of course I know there are already many tutorial about morphs or rigs,,
in this forum,, but at start point,, it is clear,,, and cover almost of basic steps,, I think,,)
and about rigs,,
http://docs.daz3d.com/doku.php/public/software/dazstudio/4/userguide/creating_content/rigging/start