Ill have to go back to Max to find out - I presume you are making some sort of weapon?

Select whole model.
Group it.
 Go to rendering tab.
Go to Material editor.
Select your pic
drop it onto model

Go to modify
Select UVW map.

Select sub object
make sure planar is selected
Set the alignment (X,Y orZ)so the yellow plane is aligned with the side view of the model
Select bitmap fit at the bottom
find your texture, and select open.
If you render the texture should be on the model but probably not correct.
Youll have to scale the yellow box till the texture fits properly.

This should do it.

There was a web site which had a pictorial of how to do it.

As far as texturing a weapon or object, it the same process for version 3 or 4. If you need additional tutorials, let me know and I'll look for some links.

First make sure you have all the plugins installed from you latest GR disk. The GR plugins allow you to use .RSB's to texture, without the plugin you could not use an RSB. it's a lot of steps but gets repetitive after about 400 models, lol.

Well, you have to manually place the 3ds plugins into the "plugins" folder inside the 3dstudiomax main folder. The plugins are on your GR cd in the "extras" folder.

Doesnt the texture have to be bitmap only?
Cant quite remember. Coco knows, he told me

That would apply to a rogue spear weapon, which required a BMP in 3dstudio, and an RSB in the actual mod. The GR plugins allow the use of rsb's. I have never tried to export a RS model with the GR plugins so i don't know what would happen as far as the texture issue goes...

Well, QOB's cannot be opened with 3DStudioMax. They can be exported, but not opened. Mike Schell has converted a lot of the models from GR, DS and IT into .3ds format, so they can be opened, modified, and exported. Check over at http://www.planetrainbowsix.com/atwar for the downloads section.