Open folders 'Sprites:

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

add beneath it:
fed_galaxyr6w1 miniimages1 384 128 128 128


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

add beneath it:
fed_galaxyr6_si systembackgrounds2 512 0 512 128

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(Optional, Shipyard exclusive. Only use if you intend to make veterans 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_galaxyr6	all_interface_buildbuttons02	0	208	96	96		#	1	3