I've install it using this method for match a fake P3Dv4 path:

https://www.youtube.com/watch?v=gTsDNwhAsVE

in this way the installer match Prepar3d v4 version but install it in v5.
It work but without sounds (maybe old fix DLL.XML file will work? but we NEED indication buy Captain Sim at this point), some grapichs issue (Autopilot numbers for HDG,ALT,etc look ugly), lights (but this also a LM issue waiting for HF2) and I suppose some issue about Autopilot use that need to be fixed by CS.

They said that v5 version will out, but I'm pretty sure they are all concentrated on 767 actually.

Well, I think that this fixes are very few and fast to do...I don't want to wait two years for L-1011 v5 versiona darn.... :-/