Hi guys, Thank you for all your help!

It finally worked on samung S8 plus:
1. system: Android 7
2. download and unzip the Modified multimode.ini, from post 33, copy into ui_android folder
[modes]
; mx=WidthMin..WidthMax, HeightMin..HeightMax,Folder
; OR
; mx=Width, Height ,Folder

m3=768..1050,400..700,"800_480"
m4=480..700,700..1050,"800_480"
m5=1024..1580,552..1000"1024_768"
m6=600..1000,800..1580,"1024_768"

3. download the skin file "for_S8_S8+.zip", unzip and copy into ui_android folder; from post 36
4. modify the sys.txt
[rawdisplay]
driver="engine"
force_renderer="RENDER_MOYA"
screen_xy="auto"
highres=1
5. Then install the iGO (version: iGO Primo Israel v9.6.29.636868)
It is now working!
Will do road test shortly!