This has probably been discovered already but I'll throw it out there. If you open the ar_stats file with Wordpad in the GTASA Data folder you can easily alter the rate of improvement and time it takes to improve in any skill or weapon. Example: the STAT_TIME LIMIT (amount of time in the air) for flying skill is 300. You must be in the air for 300 seconds before you improve by 50 points in your flying skill. This increment is shown in STAT_INC_FLIGHT_SKILL. Just do the obvious, drop the time and increase the benefit. I went with 2 seconds and 500 increment. I jumped the fence at Los Santos international, hopped in the Shamal, and kept the plane in the air for about 5 seconds before bailing. Hello Pilot license and Max flight skill! Repeat with Max Health, Stamina, Weapons, Driving, etc. Once you get the idea and find the necessary weapons around Los Santos you can be completely maxed out in all skills and Hitman in every weapon except Spaz12 shotgun (That weapon won't appear until you open San Fierro). Hope this helps!