Ok, in that case, it's simple. In my opinion XD
Simply open up a already made texture for in game meshes. Edit it as you please, I sometimes use photos to make things look realistic, you can draw them on if you want, whatever suits your fancy. Don't make any other changes other than visual ones, or you could ruin it. Then save it with a different name. I tend to save my textures in the rocks folder, so i know where they all are.
Next is the trickier part. You now have to open the rock texture material file in note book (Not the tricky part) Just right click and select open with, then select notepad. Now you have to do a little coding adjustment or whatever you want to call it XD Copy and past this BENEATH the rest of the writing, so you don't over write anything important before making your changes. Don't change anything already there.
material rockMat
{
technique
{
pass
{
cull_hardware none
cull_software none
texture_unit
{
texture rockTex.jpg
}
}
}
}
Change the red section in what you want to name the texture. This is what you will be writing into FH's object maker to give your objects their texture.
Change the green into your textures name itself. I only ever use jpg's or png's. I don't know if other types work.
Now simply open your mesh in the object maker, and type the red words into the texture area, and hit update. your object should now be texturised XD It may take a lot of adjusting to get the look you want, but it is worth it on the end. I used this method to turn the FH world and icons in my FH into dark themed stuff, purple leaves on the oaks and everything XD