Using DOOM + DOOM II textures in one PWAD

Pretty nooby question ahead:

I'm making a vanilla-style Doom2 map (DoomBuilder2 / ZDoom [Doom in Doom format]) and it uses textures from Iwads DOOM and DOOM II.
How do i go about saving my level so that all textures are included whenever someone plays it in GZdoom or some engine like that? I'm considering adding some custom music too.
Thanx for the replies. Sorry if this was asked in a previous thread, couldn't find it.

https://www.doomworld.com/idgames/graphics/d1gfxd2

or https://www.doomworld.com/idgames/graphics/fulltex

Ke-Sula said:

I'm considering adding some custom music too.

https://doomwiki.org/wiki/Adding_custom_music