[RMVX ACE] PLEASE HELP WITH CUSTOM TILESET TRANSPARENCY IN GIMP

I've been trying my best, and have spent two days getting no where in the actual mapping of my game, I've spent about a month at the most mapping out with the defualt sets and sprites and have decided to really start on production. I own SAI, GIMP, and firealpaca and use GIMP(because I cannot afford photoshop) to make my tilesets. I've taken pictures from google and used the sizes to determine my own tilesets. I've heard of the A set being the only one to be capable of layering, but it still does not work. I made sure it was transparent in the file, even tried in firealpaca where I can easily set the transparency. Nothing has worked so far, and I'm adding in such detail I can't use just events to add layers. I have also tried searching the web for anything like this, but nothing is straightforward nor does it help at all even in the slightest. I'm in no real rush but want to make this game in my own image, I've been getting frustrated and have had to put down my laptop before I get so angry I just drop the project. Because it means a lot to me, the characters I've had for 7 years and finally have acquired the material only to be pushed back. Any help would be appreciated, but if I'm recommended scripts I would need step by step instructions as I have no experience with it.
I'll paste what I'm looking at in a dropbox link

As you can see the lamp is posted but the wallpaper is gone. This wouldn't be as much of a problem if my desk tileset wasn't on the same block. Considering the amount of effort I'm putting into this, the problem will occur very frequently.
Thank you for your time.