So, now that my post count has reset, I would like to clarify a few things.
First, as it was apparently decided you can only post three times a day and send three PM's a day, I was unable to continue conversation of any sort. While I understand the need to silence those who flood and spam, such a binary approach defeats the purpose of having such a site if you ask me. That being said, I appreciate the helpful responses my post has gotten.
Second, EVERY Doom engine I have downloaded (including this one that I got from DOOMWADSTATION.NET – which kind of implies that the standard WAD would be included) included a WAD file of some sort, even if it was only the first episode in 16-bit. So when it came to Doom, even with the Island mod, I RARELY had to deal with that sort of thing that much. Even the Island mod came with a batch file that I only needed to create a desktop shortcut for, and I played it for perhaps three years before my desktop nuked itself. I don't remember having to do much other than install it, so perhaps I already had the Doom II engine, presuming it can load WADS from the original game.
Third, I am quite familiar with file systems, hailing from the days of MS-DOS when you had no choice BUT to know these things. Thus, I am aware that non-standard WADS generally require a command-line syntax parameter. However, I never really had to use these syntax parameters, as the few I might use are generally covered by cheat codes, and I have not played DOOM in over three years either.
Last but not least, I try not to mention this, but I have Asperger's Syndrome, a high-functioning form of autism. Hence, not only do I have difficulty retaining certain things due to what amount to related developmental issues, I often can see things that other people don't see, but generally don't see things the way other people see them. Gaming is one of the few things that keeps me from bouncing off the walls – or worse. To explain my original post title, I also get easily frustrated when things do not work as they should or go as planned.
This disorder often leads to regression, meaning it gets worse, something I show a lot of indicators of. I don't ask for sympathy here, but some empathy would be nice, rather than smart-assed responses implying that I simply don't want to learn what I'm doing. Those who did so – NOT COOL. It wasn't called for, and you're not helping. As I explained earlier, I did this before and it's not working the way it did before. And before anyone starts hollering 'snowflake', I can appreciate sarcasm when it's not at anyone else's expense.
That being said, with some of the responses received, I believe I will “ride off into the sunset”, and if I get the Island mod working, so be it. If not, so be it. It doesn't really seem that this site is the place for me to be. TelicAx7, I'm PM'ing you shortly so we can continue our conversation elsewhere. I should think gzdoom IS a Doom 2 engine, given its later release date, but perhaps not.