Hi, MTA does not allow using modifications such as cleo mods, asi mods and others. It has advantages like preventing potential cheaters, but it has also disadvantages such as prohibition of using helpful modifications that players used on singleplayer mode or SAMP for years. One of them is the widescreen fix made by thirteenag, it decreases the hud in-game, so it doesn't take a half of your screen. Often people playing on laptops with resolutions like 1366x768 aim this problem, but also desktop users. Unfortunately it isn't possible to use this modification on MTA, so it would be very nice if developers would try to code this option and implement it. The opportunity of switching to widescreen mode would be just available in MTA's video settings.
Here are some screenshots showing the difference, both were made on the same resolution: