Could you possibly explain more about it (and maybe with a link).
Download GTAG Opcode definitions v2.0
I'm pretty newbish when it comes to CLEO, currently I'm not much further than editing on screen texts from pre-made mods.
He doesn't do explaining
Generate the definitions for SB3, including sascm.ini, opcodes.txt and keywords.txt - and if you have the new version of SB you can enjoy a dedicated "SCR Mode" where you can write code more like this
But that script has global variables, so it will of course destroy your game and in fact, your entire life. Replace it with an unused local and it will work just as well, but have less risk of breaking when you have another mod which uses $99 (e.g. the same mod)
The problem itself is fairly common. The script doesn't include a specification of the "line width" of the drawn text, and therefore is subject to what's used for the previously drawn text. When the modder tested, it looked right because the right width was already set, but if another text is drawn, or a certain text not drawn, something like this can happen.
Just try being a bit more specific:
set_text_size 640.0 // draw up to the rightmost edge of the screen
set_text_scale 0.15 0.71
set_text_colour 255 255 255 255
set_text_edge 2 rgba 0 0 0 0