Binding pictures to maps

[Dougurasu 0]

Hey guys, first time posting, so I hope you don't mind me cutting straight to the chase

 

I'm trying to make a little cave with a hidden little area for a secret chest. Basically a hallway and one part where you can go through the south wall and then that part fades in. I've been trying to do that with a picture that shows up and gets faded out, but of course it doesn't automatically bind to the map. So I've been looking on the internet, however while a lot of people say that there are plenty of plugins that bind pictures to maps, I've not been able to get this working so far. What I've tried: 

 

TheUnproPro's Parallax Pro: I got it to show the picture as an overlay, but adjusting the opacity doesn't seem to work and it probably doesn't have a nice fade to it. 

Hudell's OrangeOverlay: I can make it a par image and have it show up, but I cannot adjust that image in any way once I put it in the notes for the map. You'd probably think it would work with the plugin commands using it as a fog (it has a fade duration and everything). But nothing happens if I try it that way. 

Galenmereth's TDDP_BindPicturesToMap: Just gives me "TypeError: Cannot read property 'length' of undefined" on startup. 

 

People say there are plenty of plugins that can do this out there, but I've only find the above three so far. Also I could perhaps make it so that every half a second picture gets shifted a little by getting the size of the map and the position of the main character and then just pinpointing where it should be, but honestly that sounds like the difficult path that would cause me headaches every time I try something like this. (However, if there's a super easy way in vanilla rpg maker to do this, do tell me :b)

 

Now, I'll be the first to admit that I did RPG Maker 2003 a long time ago and finally after moving back to windows wanting to dive in again, so I have not had too much experience regarding plugins. But I think I got a reasonable understanding of it. However it just doesn't seem to want to work, so if anyone could help me get it to work with one of the above mentioned plugins or another plugin, that would be an absolute life saver o.o This should be extremely easy to do, right? Thanks in advance!