Here ya go lege
1)Find the dds file named "GiantHydra1.dds" its in the mapping folder, no sub folder. This is tarrask's black head. If you did not specify a location on installation, the file should be located in:
C:\ijji\ENGLISH\Lunia\Mapping
2)Make a copy of "GiantHydra1.dds" and name it something like "GiantHydra1.dds (2)"
3)Delete the file "GiantHydra5.dds" This is tarrask's red head, and also the file that ddb uses to map itelf.
4) Rename "GiantHydra1.dds (2)" to "GiantHydra5.dds"
5)Finally, although not necessary, if you wish for tarrask to have all black heads instead of 2 blacks 1 green 1 yellow and 1blue, repeat steps 2-4 On the files "GiantHydra2.dds" "GiantHydra3.dds" & "GiantHydra4.dds"