so have a fully customized opening_plugin.rco, bootwave, custom coldboot text + psx emu fully working.
get yourself a decrypted game_plugin.prx of your _current_ firmware. ;)
open it with hexeditor make a search for opening_plugin.rco and look for
change it to lets say:
rename the original 3.03/3.10 opening_plugin.rco to 0pening_plugin.rco
flash game_plugin.prx to vsh/nodule and 0pening_plugin.rco to vsh/ressource.
i've seen many people doing white coldboot text's but just want remind that you can have colored icons/texts
just keep in mind that you limited with 256 colors