Help in Skinning in MED.

Hi,I downloaded a Batman model.Their is a folder where all the skins are their in BMP format.The model was in obj format,so when i import it to MED it is without skins.So i go to the manage skins and set a Body skin from the skins folder which i mentioned earlier,then i go to the skin editor the whole model appears in the body texture.The model is divided into diffrent groups.Like head is in diffent group,the body in another and so on.So how can i assign a different skin for the head,body,legs,cape parts.Please can someone help.

just activate group mode ( the button after the "redo" arrow )
and select your group
open the skin manager and load or assign the skin
save your mdl
thats it

Or just select all groups at once and set the skin.