Due to the multi-color function of 21019, the decoration process is looks difficult but is actually quite easy.
You can find it below:

In the examples below "Decor #1" refers to a decoration made according to UV map "21019 (3815+20460+20461)_1-6".

For DecorationMapping use:

The hips (3815):
	<Mapping decorationID="Decor #1" designID="3815" surfaceID="1"/> <!-- Hip section -->
	<Mapping decorationID="Decor #1" designID="3815" surfaceID="2"/> <!-- Crotch section -->
The left leg (20460):
	<Mapping decorationID="Decor #1" designID="20460" surfaceID="2"/> <!-- Upper leg section, front -->
	<Mapping decorationID="Decor #1" designID="20460" surfaceID="3"/> <!-- Upper leg section, side -->
	<Mapping decorationID="Decor #1" designID="20460" surfaceID="4"/> <!-- Lower leg section, front -->
	<Mapping decorationID="Decor #1" designID="20460" surfaceID="5"/> <!-- Lower leg section, side -->
	<Mapping decorationID="Decor #1" designID="20460" surfaceID="6"/> <!-- Feet section, front -->
The right leg (20461):
	<Mapping decorationID="Decor #1" designID="20461" surfaceID="2"/> <!-- Upper leg section, front -->
	<Mapping decorationID="Decor #1" designID="20461" surfaceID="3"/> <!-- Upper leg section, side -->
	<Mapping decorationID="Decor #1" designID="20461" surfaceID="4"/> <!-- Lower leg section, front -->
	<Mapping decorationID="Decor #1" designID="20461" surfaceID="5"/> <!-- Lower leg section, side -->
	<Mapping decorationID="Decor #1" designID="20461" surfaceID="6"/> <!-- Feet section, front -->

For a Palette PAXML file use:

		<Assembly designID="21019" quantity="1" ItemNos="_______">
			<Part designID="3815" materialID="COLOUR ID OF HIPS">
				<Decoration surfaceID="1" decorationID="Decor #1"/>
				<Decoration surfaceID="2" decorationID="Decor #1"/>
			</Part>
			<Part designID="20460" materialID="COLOUR ID OF UPPER LEG">
				<SubMaterial surfaceID="6" materialID="COLOUR ID OF LOWER LEG"/>
				<Decoration surfaceID="2" decorationID="81185"/>
				<Decoration surfaceID="3" decorationID="81185"/>
				<Decoration surfaceID="4" decorationID="81185"/>
				<Decoration surfaceID="5" decorationID="81185"/>
				<Decoration surfaceID="6" decorationID="81185"/>
			</Part>
			<Part designID="20461" materialID="COLOUR ID OF UPPER LEG">
				<SubMaterial surfaceID="6" materialID="COLOUR ID OF LOWER LEG"/>
				<Decoration surfaceID="2" decorationID="81185"/>
				<Decoration surfaceID="3" decorationID="81185"/>
				<Decoration surfaceID="4" decorationID="81185"/>
				<Decoration surfaceID="5" decorationID="81185"/>
				<Decoration surfaceID="6" decorationID="81185"/>
			</Part>
		</Assembly>


By creating your decoration with UV map "21019 (3815+20460+20461)_1-6" LLD will make the decoration without any seams.