I hardly understand English. I can not express myself well in English.
Right, for
hairstyles ... it is the same.
If you want to MAKE hair (without bodies) ... like this one: moogleoutfitters.deviantart.co… ... just skipping "3. Load the second model"
If you HAVE a hair ... and you want to add it to an other model, then it is exactly the same. The hair is loaded as the second model.
"
Wher to put them when I download them ? " .... I do not understand the question.
To make Heteochromia eyes ... is difficult (some more effort). Most models have the left and the right eye on the same part ... and both share the same texture. But it is the same guide.
You can load the character model twice times (Step 1 and step 3 of the guide).
After this ... select ... for the 1. model ... the right eye bone ... press the Rotate/Move/Scale button to "Scale" ... and move the right slider to zero. Now the eye is invisible.
After this ... select ... for the 2. model ... the left eye bone ... press the Rotate/Move/Scale button to "Scale" ... and move the right slider to zero. Now the eye is invisible.
Now, "3a. Select ”Options Make Items Optional“ and select all parts from the 2nd model ... except the eye ... to remove it.
(You have now 1 model without the right eye ... and the 2nd model, consisting of only .. the left eye.
)
Continue with 5. and 6.
Use the "Modify-Material Editor" to "switch" the "diffuse texture" image of one eye (switch the blue image to the green eye image)
Save everthing with step 7.