If you edit the model in 3ds and add textures, it keep the texture maps so all u have to do is re-apply them... might help with your textures.
With the sub-objects. I'm afraid I can't help you (I havn't got it right myself yet) but I have been told to look out for something called Trueview- a plug in for Truespace that allows you to see Hierarchy. Havn't found it yet, but two sets of eyes are better than one
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"Supernova, ya supernova, supernova goes pop
supernova, ya think it's over but the supernova don't stop" PM5K
Death:"Arnold Judas Rimmer... your life is over. You will travel with me to the-"
#knees death in the groin#
Rimmer:"Remember matey, it's only the good that die young"
Kudoth, god of pointless educational programs.