Remember that this only works on 1920x1080p so far. It's important to put your game into 600x800, as that's what this overrides. Make sure to edit your exe in the post above.
What you have to do is go into your Sims 1 install folder and merge the UIGraphics folder with this one. If you want to try it out or help me make it even better, download it Here! Notice no bad neighborhood backgrounds or ui! There still are a few problems, such as you cannot zoom too far out without a weird bug, but with the widescreen you don't really want to anyway. I wasn't happy with it, so I looked into how I could fix it, and Voilà! I have edited the UI to fix the weird bugs. This works, but has many issues, such as the sim UI doesn't refresh properly or the neighborhood screen looks jank. You might've stumbled upon this comment on how to edit your sims.exe file to play the game in widescreen. There was a chemistry table that was added on one of the expansion packs that allowed you to change your Sims statistics. Remote SIM Provisioning Operation Operator Profile Installation. This is a very similar mechanic to the science station on the Sims 1. An example is illustrated in the following figure. If you're like me, you've looked for a way to play The Sims 1 in widescreen. For example, you can create a serum that will fill up the hunger bar of your Sim so that you do not have to eat.