RM2K:
1: Go to the Event Editor. Choose if you want the event to be push key, hero touch, auto start, or parallel process. Go to the 2nd page of the event comands and select "Set Screen Tone" Move the sliders until get the tint you want.
2: You can either make or find "System" files. You can use any paint program. The files have to be 160x80 in size. Look for tutorials on making these.
(I personally can't make any. :nervous:)
3: You can have 4 at a time.
RM2K3
1: Same thing except the command is called "Tint Screen".
2: Same thing
3: Same thing
4: I found a download at
http://rpgmaker.thaiware.com/download/
Scroll down to "RPG Maker 2003 Main Program+RTP" and select
- RPG Maker 2003 1.09a (Eng) + RTP