Since GTA SA's Textures and effects suck, i'll post in here some nice mods to make it nicier.

For The Weapons*****
-GTA 4's Weapons
-GTA 4's Fire Ex & Satchel Charges
-Realistic Weapons Mod
-Realistic Katana

Textures*****
-STR3 HD Textures
-HD Clouds
-HD Seabed
-HD Water

Effects*****
-ENB Series
-Nice Particles

HUD*****
HD Map
GTA 4's HUD

that's it for now!

Notes*****
-ENB Series will ONLY work on fast and good PCs.
-STR3 Could Lag/glitch/bug alot. Try finding a Fix on the Net