Open folders 'Sprites':

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Open 'miniimages.spr' and find the following line:
fed_galaxyw1 miniimages1 384 128 128 128

add beneath it:
fed_excaliburZw1 miniimages4 0 0 128 128
fed_excaliburYw1 miniimages4 128 0 128 128


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Open 'systembackgrounds.spr' and find the following line:
fed_galaxy_si systembackgrounds2 512 0 512 128

add beneath it:
fed_excaliburZ_si systembackgrounds13 0 256 512 128
fed_excaliburY_si systembackgrounds13 0 384 512 128

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Open 'gui_global.spr' and find the following line:
b_fed_warpin_special	all_interface_buttons04	416	312	96	96		#	5	4

add beneath it:

b_fed_warpin_specialY	all_interface_buttons04	416	312	96	96		#	5	4
b_fed_warpin_specialZ	all_interface_buttons04	416	312	96	96		#	5	4


~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
(Optional, Shipyard exclusive. Only use if you intend to make it buildable)

Open 'gui_global.spr' and find the following line:
b_fed_galaxy	all_interface_buildbuttons02	0	208	96	96		#	1	3

add beneath it:
b_fed_excaliburZ	all_interface_buildbuttons13	0	0	96	96		#	1	1
b_fed_excaliburY	all_interface_buildbuttons13	104	0	96	96		#	2	1