Hello guys , i think all of you are looking for a perfect GTA V hud but you guys usually find it not working or the crosshair dosen't fit.
I will present you a GTA V hud that is 100% working (i tested it) , follow my steps !

First off all , download Alexander Blade's GTA IV hud from here
http://www.gtagarage.com/mods/show.php?id=4483

After that , copy all the files to your gta san andreas folder (BACKUP FILES BEFORE REPLACING THEM)

Then download in45do's modification for Alexander's hud (this will make it rectangular and like GTA V's hud)
http://www.gtagarage.com/mods/show.php?id=24559

after that replace the files you extracted from alexander's mod by in45do's mod (GTA_IV_HUD folder and some other stuff)
Enter GTA_IV_HUD folder and open the file Main.ini , set CheckExeVersion to 0 and showaboutatstart to 0

if the game crashes when you load/start a new game , that means you have an EXE file that is not supported , but that can be easily fixed by replacing your gta.exe by this one here
http://www.mediafire.com/download/64g8efr2814dxgg/gta_sa.exe
(Backup before replacing)

and here you go (download MP version of in45do file or SP depending on what you want to use it on , Samp or singleplayer)

Note :
now you can install the SP edition only and it will work in SA-MP. and a fix for this hud that adds/Change
-new phone texture
-better hud size
-fixed graphics

Download the "Fixed Graphical Hud by in45do" here : http://www.gtagarage.com/mods/show.php?id=24559

Cool !