The download link in the OP has been updated again.
Added:
Chapter 5
With one new playable character, perhaps a familiar face and name. 
There have also been some graphic updates, new portraits to replace generics used in previous chapters. The Credits list has been expanded with the new additions from the Repository.
The download link in the OP has been updated again, and now the thread is no longer in the Concepts subforum!
Chapter 6
With the previous chapter being on Merceus’ doorstep, this one is a map of ancient Fort Merceus. Perhaps a few elements of the layout will be familiar, even.
It’s a snap.
With two new recruitable characters (well, technically Indech is only recruitable after beating the chapter, but shhh 
)
Minimug!
I’ve integrated the catball style Modular Minimug Box into the hack. Should be quite helpful for the players out there. As always, credit to the original creators.
Thank you for staying with this thread! There’s not been much discussion, but I’m seeing clicks on the download link growing steadily, so I hope those giving the current demo a try are having a good time! And, again, if you see any issues, or have any comments, I’m willing to hear them out - I am still learning and I appreciate all feedback!
Until next update!
This is such an intriguing project Augenis, I’m sucker for projects that expand in the lore of the canon, so I’m very happy to see it is progressing, I should give it a try myself, but I’m unable currently.
Thank you! 
I’m glad to hear it. I started on it when I realized that there seems to be rather few projects focused on Fodlan, while at the same time simply liking the idea of writing a prequel (always been fascinated by those in my fanfiction days).
Hope you get a chance to try it, I’m always looking forward to feedback!
Oh Fodlan lore!
I’ll stick to it!
Oh, I really liked those first chapters, I’m quite a fan of gameplay-story integration, the prologue was chilling!
I’m feeling already engaged with the plot, I was a bit disappointed to learn that after Chapter 5 Sacred Stones returned as usual, hahaha xD
I’m intrigued to se how this plot will continue, specially considering the story of the past happen during many years.
BTW: I don’t know if someone said this before, but in the last cutscene of Chapter 5, Rhea and Wilhelm were stuck in the walls meanwhile talking xD.
How am I only just now seeing this? Definitely going on the list.
If it ended after chapter 5, then did you not get access to Chapter 6 (Indech)? And ah, I’ll have to check the chapter 5 cutscene.
Thank you for the kind words!
Yeah, the Cutscene from Sacred Stones’ Chapter 6 started playing instead of what I assume should be the sixth Chapter, I finished the map normally instead of using the debug insta-win conversation (and did checked what happpened after insta-winning), I did want to experience the map xD
Ah, I see. That is odd, I haven’t encountered this before. It’s possible that it was caused by the Indech chapter being built on 5x and 5x’s old code causing some issues (I’ve patched it out now on my working build). I’m going to try hunting for this bug.
Thank you for the report, and again glad that you enjoyed the work thus far!
will this include functional supports?
It will indeed! A handful have already been written and added to the hack (like Rhea/Cethleann and Wilhelm/Johanna), but I haven’t mentioned this in any updates yet because the supports are still in their preliminary stages and I write them at the side when an idea for one pops to my head.
So, good news, after a playtest of the release build (and failing to beat my own Chapter 5 twice 
) I found the issue, and it was indeed a bug. For some reason, Chapter 5’s “seize” event called the Chapter 6 ending cutscene, not the Chapter 5 one, so it “skipped” all of Chapter 6 - which must have been rather confusing. I’ve (hopefully) fixed it now, and updated the download with the fix.
Either fortunately or unfortunately, this also means that the new build also has several other graphic and text fixes and updates I’ve done since last release - including new and reworked portraits.
Indech and Ernest, by Vlak
And an updated Nemesis, by me!
Just in time for FEE3, I guess 
Love that Ernest’s design seems partly based off my old Male Anna! We’ll watch the progress of this project with great interest! Best of luck!
The download link in the OP has been updated again! It’s only been a bit over a week since the bugfix patch, but having finished this part I figured I may as well release it right before FEE3 begins.
Chapter 7
With two new recruitable characters:
Hope you all enjoy it, I’m looking forward to any feedback and impressions, and until next update! Quite excited to work on the next chapter soon, because, well
I run into vanilla FE8 after chp.5 as well = =
Have you checked the triggers?
With the updated patch, too? Darn, need to check then…
The triggers were fixed in the patch, I’m not sure what else is broken, if you’re playing with the newest patch that is.
Yeah but I downloaded from the link above before about 4 hours = =
Well, then I am stunned. Are you certain you downloaded the most recent version? I’m going to try to look around, but I can’t seem to find anything that would cause this, now that I’ve patched out the triggers issue completing Chapter 5 with debug conversations triggers the transition to Chapter 6 normally for me. I’ll also ask my friend playing on Ch 5 right now to see if he has the same issue.
I downloaded the Oct.3 version