Scroll down until you find smic_player_default_1.wtd.
Open it, import and replace with the downloaded file, click Save.
Download MagicRDR and unpack the archive, open MagicRDR.exe, click File in the upper left corner, open the folder with the game RD1 Directory, select mapres.rpf.
Click Root > Mapres, then copy and paste smic_player_default_1.wtd into the search bar in the upper right corner, open smic_player_default_1.wtd.
Click Replace, then replace the downloaded file and click Save, click Replace again.
Go to the top left corner, click File, then click Save again.
A message will appear asking if you are sure you want to close, click Yes.