Sorry for a probably n00by question...

[Dark Mystic]

What is IWAD? I got srb2.cfg into Doombuilder and I ran the program. When I clicked "Sonic Robo Blast 2" on the game list, it said "You do not have the IWAD for this configuration" or something like that. What is wrong?

EDIT: This is what it says:
WARNING: You have no IWAD file set for this configuration!
WARNING: Could not find required lump PLAYPAL

Still...what's wrong?

I tried making a random level in which I did not know what I was doing and I came up with this:

 

[BlueZero4]

http://clipper.ship.edu/~af0916/srb2/dbtutorial/tutorial.html

My friend, if what you say is true and you do not know what you're doing, I would recommend a tutorial.

 

[Dark Mystic]

Ok. This is actually working. Thanks BlueZero.