ro9ue,
I am assuming that your imported model is simply 1 piece i.e. it appears in MilkShape as one item...
Ok.... In order to assign parts to a group they must be "selected" .... let's say we want to assign the 2 wings to a group to be called "wings", firstly, to select the items in any of the milkshape view windows, use the tools menu on the right hand side of the milkshape screen, press the "select" button then under options (below it) select "face" and make sure the "by vertex" box is ticked.. Then using the standard "grey" window's hold the "shift" key down and holding the left mouse button down drag a box around the "wing" vertex's, select the faces you want to make into your "wings" group.... dont worry if you dont get all the faces in one go.. and if you select faces that you dont want to include by mistake, these can be unselected using the right mouse button.... do not let go of the shift key .. hold it down until you have as many faces as you can get easily..... these faces will go from standard white on grey to red (showing that they are selected) ..
Now go to the "groups" section of the tools menu....under group subheading there are 5 buttons; "Select", "Hide", "Delete”,” Regroup" and "Rename" and a small white "text window" to the right of the "Rename" button... press the button labelled "Regroup” and your selected faces are regrouped into "Regroup01"which appears in the small window to the right of "Rename".... now if you have all your "wing group" regrouped, simply highlight the text, type in wing or wing_group and press the "Rename" button. Then save the file.... However, you may have to do this several times to get all the faces belonging to your "wing" group.... To make things easier you can hide the regrouped faces to allow you to get to faces previously missed.. Select the faces you need to add to your group unhide the faces select them and regroup again ......Another way to select faces is to maximise the 3d screen (Blue), this allows you to rotate the model to get at faces that are hard to select in any of the plane views, except that in order to select faces in this view you must select vertex's directly using the mouse button, and you need to hold down both the "shift"+ "alt" keys.
Next, having done that we need to assign a texture to it.... in order to do that the group must be selected... Select your group using the groups window... Highlight the item with the mouse, use the "Select" key and select your "wing" group (it should turn red in the plane views) (grey), now open the materials menu, select your texture and using the "Assign" button, assign the texture to the "wing" group. Then open the texture coordinate editor and since most "wings" are on the top/bottom plane, use that view in texture coordinate editor, hit "Remap" and your group is then overlaid in wireframe on the texture, move it around until you are satisfied and then save the file..
In some instances the texture on the top of the wing and the bottom may differ.. however any "group" can be broken up into subgroups .. for instance.... Using the wing as an example we could have 4 "major" subgroups - wing top left, wing top right, wing bottom left, wing bottom right, plus the leading and trailing edges could also be separate "minor" subgroups. By using the various views available in the texture coordinate editor, (or by rotating the ship) we can assign the same texture to sub groups, then when satisfied regroup the subgroups back into a single group.
I do hope this answers your question...
Harrier
Retreat[![! ---- I'm too badly messed up now[![!