I found lots of links which should help, but they just show an error sign

Have you checked the link found here;

https://www.gog.com/forum/kings_bounty_series/gogs_kings_bounty_the_legend_v1_7_build_35396_has_some_serious_bugs/post35

I've just tried downloading the file (following the renaming instructions) and all works as it should.

Also, I checked the link in the message below that one;

http://childofbhaal.chez-alice.fr/OperationKordar.rar

and that also works. Hope this helps.

thanks