I'm sorry to say but this project will fail horribly.
Some of the cutscenes have typing mistakes which IMO already takes away a bit of the immersion.
Also as said before some of the missions aren't even possible like train missions for example.
And how do you want to make an entire project when I can't even come past the first mission?
That bars can be destroyed! hahaha!. Hit it!
I shot the bars and it didn't do jack sh*t and as a matter of fact I completed GTA SA twice on my PS2 and twice on my PC.
Anyway I will check out your second part of the missions.
EDIT: Alright I checked out the 2nd part of the introduction and GTA V mission 1
As for the 2nd part of the intro I don't know what version of GTA V you played but I don't recall them jumping off a train track and swimming to shore? Or Trevor shooting down a police helicopter with an RPG?
Anyway as for the GTA V mission 1 (And actually the 2nd part of the intro too) most of the missions' time there isn't any marker on the mini map of where the checkpoint is or where the car/cars are that you need to enter.
I figured it out by myself but still.
These things all matter.
I found your typing to be a bit better though which is a good improvement.