Rust is only needed to compile gmktool.
To apply a patch file you need to use gmktool.
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Code:
# Dump strings to strings.txt
gmktool data.win strings dump strings.txt
# Now edit them with a text editor or something.
# And finally, repack the strings
gmktool data.win strings repack strings.txt
presumably, you used the 'gmktool data.win strings dump strings.txt' command to extract the strings.
You need 'gmktool data.win strings repack strings.txt' to patch data.win