You'd really be better off just copying the content you want to modify into a PWAD and always loading it when you play, rather than modifying the IWAD itself, honestly. Netgame incompatibilities and stuff.
You'd really be better off just copying the content you want to modify into a PWAD and always loading it when you play, rather than modifying the IWAD itself, honestly. Netgame incompatibilities and stuff.