@darkinferno: "huh, umm, "in fact it startup will be slower" (sorry, your right of cause - my bad english

)
From all I understand preload_mode=3; loads
all entites (even models loaded later in the game process) into memory at startup - against preload_mode=1; accesses to the hard drive if a later ent_create is processed.
It has nothing to do with the transfer of the informations to the video memory.
Too bad because to transfer all "models" to the video card (whatever there will be moved?) must be done with a camera total at the whole level scene.
Maybe this can be done with a fullscreeen splash panel...