How do I extend the duration of a cutscene and destory the "remains" of an NPC during said extended cutscene?

[Erdan5]

To clarify, let me explain my background on this topic and my problems here.  So, a while back, I made this post in "mod requests" where I asked for a mod with new content and effects to be made.  I don't need to worry about the new cutscenes and all of that, as I learned now the basic common sense of mod compatibility. (A lot of the things I requested for on that post back then I don't need to do now, I can simply make Extended Enclave and the Unofficial TSLRCM Tweak Pack compatible with my game, so no problem with that).  There was one final thing I requested in that post though.  What I requested was that Darth Sion and Darth Traya at the end of the game of KOTOR II dissolve into dark side energy in the same effect and style as Darth Nihilus.  After a bit of consideration, I decided to make the mod where Sion and Traya die this way myself.  I have experimented a lot throughout the months, and have learned much.  However, there are a few frustrating things about my experimentations.  My main modding tool I am using most of the time is Holocron Toolset, (because I am a noobie beginner). The main reason why I want to do the "dark side death effect" for Sion in this mod is mostly because I think the effect is cool, (and for Sion's case, was inspired by his death scene in KOTOR fan-film YouTuber DarthYcey's version of his death). 

 In the vanilla game, after Sion says his last words of dialogue: "I am glad to leave this place, at last.", he lets himself die for good and falls to the floor.  During this whole process, once Sion starts falling dead and before he even finishes falling to the floor, the mode of the game reverts from cutscene mode to gameplay mode.  After he dies, you can loot his body which is tagged "remains" in gameplay.  For my mod, my plan is to have Sion collapse and fall to the floor dead like  in the actual game, but once he is fully dead on the floor, (or perhaps when he is right going to be), he suddenly emits a cloud of dark side energy that looks like Darth Nihilus's dark side cloud, and he fades away and vanishes in the cloud.  The whole time this process plays out, it is in cutscene mode.   So yeah.  I found the script for the effect, and I found the placeable for the effect, (sithritual001), and I managed to suceed in my effect, (to an extent). The problem is that I don't know how to pause or extend the duration of a cutscene and let the effect happen.  Whenever I let the scene play out, it either results in the cutscene mode reverting to gameplay mode in the middle of this effect happening and Sion leaving "remains" behind after the effect finishes.  I will attach a  recorded video snippet from my tested gameplay to show you visually. 

 So yeah, there is my problem.  I don't know what to do.  I kind of want him to fully collapse to the floor then have the "sithritual001" placeable effect and script playing.  I also want to make that whole effect, (Sion collapsing to the floor, go through "DestroyObject" by sithritual001 and leave no remains) in cutscene mode, so that is why I asked to extend the duration of the cutscene.

(P.S., the mod I planned for this mod is planned to be a private one, as I don't think that anyone would want this mod anyways if it were public.  Just to let you know).

Edited 2 hours ago by Erdan5