As far as 3do builder goes, before opening a unit, you have to manually load the textures in.
I'll explain. On the right hand side, you'll see a large panel with TA:K ~ All, underneath arabldg, so with the down arrow key pressed in your keyboard, make sure you get to the bottom where it reads zonmonst9. 3do builder somehow does not load the textures automatically, so you have to do this every time you decided to open up the program. If you do not do this, the unit will come up with many missing textures, and you will get a pop up window saying: "loading textures". Don't worry if it comes up for the liflogo because it does it all the time any ways, and you can still use it.
Next, on the left hand side, you'll see a panel with a tree based on all the objects from the unit. You'll see objects such as hip, torso, head, etc... Left click on one, check the bottom left hand corner and a color block will come up, that is a texture for one of the faces of the object you have selected. You'll probably see a number next to 'Face'. If it says 0:3 for example, click on the handle right below it, and use your left and right arrow keys in your keyboard to go through them. If there is a blank ‘Face’, that means it is missing a texture. So right below TA: K ~ All, find liflogo/ nothingatall to replace those missing textures for now. If you want to fill out a noticeable area in the unit, then you have to pick a texture that is more appropriate.
This has to be done for every object making sure all 'Faces' are filled in with textures. Save the file, and you should be good to go.
Added: To solve the issue with 'looking for liflogo textures', simply double click on it after manually have loaded the textures through 3do builder. You have to do this before opening a unit model. And of course you have to have the file TaxTextures.hpi in your 3do builder folder, which have been explained here: http://kingdoms.heavenforum.org/t63-how-to-import-tak-textures-into-3do-builder#10682