Get your weapon skill upgraded to Hitman by and you'll automatically dual wield the single handed weapons.
Get a suitable car and take it down to Trans Fender or any other place that does car mods.
Different cars can have different types of mods applied (I. You can't mod fenders on the Turismo because it doesn't have any), you'll have to experiment. If you don't know why, you most likely skipped over a couple cut-scenes and don't listen to the radio in SA too often. Most can be found at one of the three major airports in San Andreas.
You can get the Hunter after completing the flying school with all golds.
You will unlock the Hydra after the mission "Vertical Bird".
From there the on screen instructions will guide you through the mission or you can read the Sub-Missions Guide on this site for an in-depth description.
Remember that you MUST use the parked Black Boxville to start the mission.Dillimore, Countryside - To the South West of Dillimore you'll find a red 2 player icon floating in front of a building.Kings, San Fierro - Follow the building site from the garage North, then when it ends, follow the road West.Millie Perkins (- & -) will automatically become your girlfriend after you complete "Key to Her Heart".The more girlfriends you have, the greater the likeliness one of them will catch you on a date with another girlfriend cheating on them.There's a very useful new feature in SA to help you learn your way around.