ok ive downloaded the game Doom2 online, and now ive d/l'd gbdoom, so what do i need to do now inorder for gbdoom to work, plz help, thanx

All I can say is good luck. Its almost impossible..

oh i dont have this BOOM, where can i find BOOM? and another question when it says REGISTERED version of DOOM2, does that mean i have to OWN it, as in GONE OUT AND BOUGHT IT?

It works if you download zdoom; trust me.
here.
download doom2
download gbd2demo
download zdoom
unzip doom2
unzip zdoom into the doom2 directory
unzip gbd2 into that directory
edit the first word in the batch file to read zdoom (aka, open it with notepad)and save the file
run the edited batch file


worked for me and I'm an idiot, so I'm pretty sure you guys can do it too

ok, if you get it from here, you don't have to edit anything..
http://doomworld.com/gbd2/files/gbd2.htm

plus, it has the slime blower