Another thing I plan to build on in VJ is ambient scenarios. SA has very little of this (peds sitting, holding hands, looking through shop windows and are some examples) compared to GTA IV, which is packed with random events happening, making the game more immersive.
This level of immersion is what I'm aiming for in Vigilante Justice's San Andreas...
Here's one of the things that I've done so far:
They appear at the same times of day that planes arrive and take off when you take a flight in SA. You can even follow them all the way to their destination if you're fast enough, but I think when you have a rocket launcher in your arsenal, you'll find other ways to have fun with this.
The effect will be most apparent when you're riving by an airport and suddenly notice a plane is landing at or taking off from the airport at it's scheduled time.. A bit of realism and immersion here.
This is coded using a combination of ASI and SCM. In a similar way to how other ambient scripts are launched (peds taking pictures of picture-esque things etc.) - making it easy to add them (I was done with the plane thing in 20 minutes). So you can expect a lot more!