Just a heads up, I really like this mod. It's the only one that works for me when using high quality car packs.
However, I hate being limited to only 20 vehicles.
Why only 20? I'm forced to only see less than 1/5 of all the available cars because the game never touches any of the vehicles outside of the pool.
From doing a bit of digging, there should be 120+ regular vehicles in GTA IV. If the pool could be expanded to cover most of that, it would make the game much more realistic.
BTW, I figured out that you can make multiple copies of the .dll and .ini in the script folder. This way you can program each .ini with different vehicles.
However, whenever you have more than 2 .ini's, despite how you set the update interval, the game will eventually crash. I suspect this is because you cannot have too many .ini's accessing the game's memory at once.
Hopefully the author of this mod can take a look. If a much larger pool could be made into the next version, we'd have a 100% guaranteed fix for all the car mods out there. Or you could even have multiple pools of 20 within one .ini and let the user pick if the pools will be read in sequence or random selected.