22.10 update: Uploaded completely fixed Autosave+mission restart script. As a bonus i added some upgrade skill menu after every mission.
Note: All archives don't have readme files, so read the description below 
0)[SA] Autosave + Mission Restart
SA: Install the scripts, in game press f5 button for quicksave(1 slot).
After every mission, game will save your progress in 8 slot automatically.
After mission fail, you can restart it by pressing a key, just like in GTA 3 10th anniversary.


1)[SA|VC] Autosave
SA: Install the scripts, in game press f5 button for quicksave(1 slot).
After every mission, game will save your progress in 8 slot automatically.


VC: Press "2" button for quicksave(3 slot), and as well as in SA, script automatically will save your game in 7 slot after every mission.
Before load savegame you must restart game.


2)[SA/VC/III] Reloading mod
Press R button and weapon will be reloaded.


3)[VC] Mouse issue fix
If the mouse don't work sometimes - that's the solution.

4)[SA] Midnight Club LA checkpoints
That's not replacement, so you need to change the model of standart checkpoint(cylinder.dff and diamond_3.dff in gta3.img) and install New Great Effects 1.6, if you want to achieve same effect as on video.


5)[SA] Manual gang wars
Press "f2" to provoke a gang war.


6)[SA] Realtime map
Press "Tab" for show map.


7)[SA] Aero enabler
When SA starts, it also disables Aero, this script returns Aero back after starting the game.
Tested on Windows 7 Ultimate.

8)[SA] Aero enabler with mouse fix
Special version of aero enabler, which includes mouse fix for gta sa, no need for compatibility mode with it. I made it for myself, but who knows, maybe someone need it too.
Recommend to use with fastloader.asi.

9)[III] Quicksave
Press "2" button for quicksave in first slot.

All mods tested and works perfect on CLEO 3. With CLEO 4 they may work partially or not work at all.
Source codes can be found on the sannybuilder forums.
Special thanks to Seemann, Alien, Sanchez, Deji and other members of sannybuilder.com/forums.