Wow, this is very cool!
I'm just wondering, how did you get rid of the blocks? I don't know if you've ever seen my mods, but I also did some handling.cfg edits for more accurate acceleration on the DMCs.
Just saying though, your download links do not work.
They should link directly to mediafire, not to this site.
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Here are working versions of your links:
Headlight Fix Only
Headlight Fix and DMC-13
Headlight Fix, DMC-13, and Acceleration
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In addition, the GTA Mod Installer isn't really needed since all you have to do is go to:
[Vice City directory]/data
and replace your handling.cfg file, but I guess it makes it easier for those who do not know how.
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For all of you handling.cfg editors here, if you install this file, you cannot edit these files with a .cfg editor.
The best way to edit this is to do it manually, A.K.A. opening the .cfg file in notepad and changing the values/hashes that you want to.
If you try to use a .cfg editor, you end up with red hexagons on the head lamps and white rectangles on the rear lamps.