Try to edit in text editor file "materials.xml" from folder filename+'_data' like:
Code:
<root>
<Materials override="TRUE">
<Material name="MT_BODY" diffuse="..\..\..\Textures\white.dds" Lighting="None" mobileflags="0" pass="AUTO" transparency="opaque" doublesided="FALSE" depthwrite="TRUE" zbias="0,0,0" specmul="0" specexp="2" parallaxscale="-0.03" parallaxbias="-0.015" ambient="150,150,150,255" sortingkey="0" alphathreshold="0.25" lightmapsize="128,128" lightmapgran="0" lightmapID="-1">
<Shader library="..\..\..\shaders\SWCellShading.ShaderLib" effect="BodyToonEffect" paramstring="CullMode=back;DepthWrite=true;PassType=pre_basepass;MaterialParams=0,2,-0.03,-0.015;AlphaThreshold=0.25;OutlineThickness=0.012;OutlineColor=0,0,0,1;BodyColor=0.9921569,0.8705882,0.7529412,1;DiffuseHue=1.2;ShadowColor=0.9686275,0.7529412,0.6039216,1;ToonTexture=Character\Common_Textures\ToonTexture.dds;globalAlpha=1;LightVec=-1,1,-1;BodyShadowColor=0.9686275,0.7529412,0.6039216,1;MaskTexture=Character\Player\PC_A\Textures\PC_A_Parts_Default_Body_03_Mask_01.dds;BoneColor=0.9686275,0.7529412,0.6039216,1;" />
<AuxTexture index="0" filename="..\..\..\Textures\AlphaBlack.dds" />
</Material>
<Material name="MT_UNDRESS_TOP" diffuse="Textures\PC_A_Parts_Default_Body_03_Top.dds" Lighting="None" mobileflags="0" pass="AUTO" transparency="opaque" doublesided="FALSE" depthwrite="TRUE" zbias="0,0,0" specmul="0" specexp="2" parallaxscale="-0.03" parallaxbias="-0.015" ambient="150,150,150,255" sortingkey="0" alphathreshold="0.25" lightmapsize="128,128" lightmapgran="0" lightmapID="-1">
<Shader library="..\..\..\shaders\SWCellShading.ShaderLib" effect="DefaultToonEffect" paramstring="CullMode=back;DepthWrite=true;PassType=pre_basepass;MaterialParams=0,2,-0.03,-0.015;AlphaThreshold=0.25;OutlineThickness=0.012;OutlineColor=0,0,0,1;DiffuseHue=1.2;ShadowColor=1,0.7176471,0.8627451,1;ToonTexture=Textures\ToonTexture.dds;globalAlpha=1;LightVec=-1,1,-1;" />
</Material>
</Materials>
</root>
Replace diffuse from one material to second or replace material to another .