Retail version vs uncompleted builds of DOOM

[Angelloproduct]

*Another forum post for my research sake (.-.)*

So I've looked unto the previous builds and compared it to the retailed version and found some interesting sprites using slade. I'd figure maybe additional key elements from you guys might help since figuring out how to open doom's original code has been a pain to figure out, only mods will show the code as validated info while the IWAD is just and info with a question mark icon. Any suggestion or pointers would be appreciated.