More questions about powerups

[Eriance]

I have a few more question about powerups.

1) IN Skulltag, the doomsphere changes the colormap completely to make everything red. With decorate, it only pastes red on the screen (as wehn you get hurt), but doesnt saturate. Is it possible to change the colormap or define a colormap through decorate so that one can saturate the screen rather then just tiniting the screen red?

2) Changing a player's properties when picking up a powerup, is that possible? If so, do I put 'ACS_Execute (script,map)" in some frame of the pickup state of the powerup, or what? How do I tag a player when the map starts? I want to give the player the GHOST property so that he wont get hit by projectiles other than the splash. But still take damage from floors and other evnrionmental sources. Possible?