Forestia, 640x480x8bit (256 colors)

I would like to run this old game on linux, and once it work, if everybody can run it easly, by a Lutris script, it’s better, but i don’t know how to do.

Here is the iso : https ://www.myabandonware.com/game/forestia-co1
Here is what i’ve found about 256color mode : https ://wiki.winehq.org/256_Color_Mode
Here i can find some files Forestia need :
scrnxtra.x32
pomlite.x32
http ://ericmorellini.free.fr/index.php?0=France%20Telecom&last=Xtras
but not this one : smxtra.x32

It look like i need DX9 D3D9 stuff, and PlayOnLinux look to be able to help me about that…
https://www.playonlinux.com/en/topic-10019-issue_Install_games_that_require_256_colors_and_650x480_res.html

But, i’m not familiar with PoL nor Lutris, and not very familiar with wine.

How should i do to write a lutris script for that ? To test it ? to submit it to the community ?

PS : here is a french thread where i ask the same to the play on linux community : https://www.playonlinux.com/fr/topic-17106-Forestia_640x480_en_256_couleurs.html

Any help is welcome !