Normally registry operations are made post-install. I guess this makes the most sense.

However it is possible to made them mid-install but you have to edit the script, especially the part where extraction takes place.

compiler error
 

how to solve this? https://gifyu.com/image/bnvo8
https://gifyu.com/image/bnvo8

You are likely trying to compress something too large into setup.exe.
The game must be compressed using DSG, and you cannot place anything inside the Setup_DLL folder other than the decompressors needed to extract the .bin files.