[sandungas]

Sorry ada for not to replay soon, has been a couple of days with several interesting threads in two forums related to modding gameboots/move warning screens... the release of new program and methods, and even this "proof of concept" video from Glowball1
I learned a bit about all this as a collaterall effect to understand what is this logo and if the flag you said is related to it

The old gameboot is this one
Classic PS3 Startup Sound and Logo ~Ding~ (fw 2.80) - YouTube
The interesting thing is there is an animation with particles and other effects in higher firmwares (an .xml inside custom_render_plugin.rco) for this gameboot (is still there, but the logo is hidden)

<Animation name="anim_gameboot">
	<Lock unknownInt0="0xffffffff" />
	<Fade object="object:ps3logo" duration="0" accelMode="0x0" transparency="0" />
	<Resize object="object:ps3logo" duration="0" accelMode="0x0" width="0.938" height="0.938" unknownFloat4="1" />
	<FireEvent object="event:native:/anim_gameboot_BG2" />
	<Delay time="500" />
	<Fade object="object:ps3logo" duration="863" accelMode="0x3" transparency="1" />
	<Resize object="object:ps3logo" duration="863" accelMode="0x4" width="1" height="1" unknownFloat4="1" />
	<FireEvent object="event:native:/anim_gameboot_BG3" />
	<Delay time="1100" />
	<Fade object="object:ps3logo" duration="174" accelMode="0x1" transparency="0" />
	<Resize object="object:ps3logo" duration="174" accelMode="0x1" width="1.284" height="1.284" unknownFloat4="1" />
	<Delay time="1000" />
	<Delay time="200" />
	<FireEvent object="event:native:/anim_gameboot_Finished" />
</Animation>

Im not sure if the video from Glowball1 is using one of the "move waring screens" or if is loading the real "gameboot"
The "trick" with "move waring screens" can be done, there are some guys in a spanish forum playing with it, and they has something similar with added sparks and effects
GameBoot_PS3_Prueba_4.mp4 - YouTube
Gameboot_PS3_prueba_2.mp4 - YouTube
http://www.elotrolado.net/hilo_gameboot-de-ps3_1683874
Both videos are using the "move warning screen" to fake the "anim_gameboot"
But for the real logo to show... maybe is needed this unknown "logo boot disable" flag

I know... i have no new info about if the flag exist or if it does what we think, i will take a look now that i understand the basics of this mods, in the worst case i can test all the "unknown" flags from the top of the table because i know what will happen if it works (if the hidden logo appears when launching a game ---> bingo!)