Welcome (officially) to the Forum.
Ratings can be edited by modifying fields in players.dbf. To do this, you need to download DB Commander which is available in the Downloads section. This utility allows you to open NBA Live's .dbf files and modify the data inside. If you want to edit player ratings, these are the fields you need to look at:
FGPBASE: Field Goal/Jump Shooting Rating
THREEPTBAS: Three Point Shooting Rating
FTPBASE: Free Throw Rating
DNKABILITY: Dunking Rating - controls how often a player can make difficult dunks
STLABILITY: Stealing Rating
BLKABILITY: Blocking Rating
OREABILITY: Offensive rebounding rating
DREABILITY: Defensive rebounding rating
BALABILITY: Ball handling (passing) ability
OFFABILITY: Offensive Awareness
DEFABILITY: Defensive Awareness
SPEED: Speed rating
QUICK: Quickness rating
JUMP: Jumping rating
DRIBBLE: Dribbling rating
DSTRENGTH: Strength rating
DHARDY: Hardiness rating - controls injuries in simulated play
DSHOOTRANG: Shooting Range (8-25 feet)
FATIGUE: Fatigue (Endurance) Rating
INSIDESC: Inside Scoring Rating
PRIMACY: Primacy Rating - how often the CPU will use player to score
CLUTCH: Clutch Rating
This tutorial explains the method for trading players through editing players.dbf. More tutorials can be found
here and throughout the Patching sections of the Forum.
One of the most important things to remember when working with the databases is to
make a backup before you begin tinkering with the data in case anything goes wrong. This is especially important when editing a saved Dynasty because if you mess up and can't restore a working copy of your saved game, you've lost it.