The 2021 is usually the way to go if you want to avoid the headache of manual patches and compatibility settings.
For games that are no longer for sale by the original publisher, sites like MyAbandonware sometimes host them. However, since the Remastered version is currently for sale, Scrapland isn't officially considered "abandonware" anymore. Scrapland (2004) Full Game Free Download
If you’re looking to play this cult classic safely, here are the most reliable options: The 2021 is usually the way to go