okay, here is some instructions if you change your mind:
ADJUSTING CORRECT AGE FOR A PLAYER:
let's take for ex. Shaq he's born in 1972 so he's 34 in Live 07 but he was 27 in 1999 so you must edit his birthdate through dbf so it displays his birthyear as 1979..
in the dbf you can also change his years pro in the colum "YEARSEXP"
SALARIES:
http://www.eskimo.com/~pbender/index.html
in the bottom of that page you find the salaries for every team from 1985 through 2006
Salaries must be changed in the "CASH YEAR" colum..if player is making 5000000$ and other is making 500000$ you put it "5000" and "500"
i haven't found contract lenghts anywhere, but it can be changed in "YEARS_LONG" and "YEARS_LEFT" colums, just put some fictional years there.
LEARNING, WORKETHIC AND DESTINY: (these 3 reflect each other)
can be changed from "LEARNING" , "WORKETHIC" and "DESTINY" colums in dbf
i adjust these to add some realism to the dynasty..for ex. if i make 95-96 roster there is Kevin Garnett as a rookie so i must change his learning, workethic and destiny so he can develop to an MVP caliber player in the future
here is the instructions:
learning rating scale:

1-20 - poor

20-40 - mediocre

40-60 - average

60-70 - good

70-90 - great

90-100 - hall of fame
workethic scale:

0-1 - player develops very fast if he has a good learning rating and destiny rating 0-1

2-3 - player delelops in a slow pace if he has a good learning rating and destiny, if he has a low learning rating and destiny..he rarely becomes something

4 - this combined with a low learning rating & destiny, causes player to be out of the league in no time
destiny rating scale (can be changed in the "DESTINY" colum)

0-1 - likely hall of famer

2-3 - good potential, with a lots of training might be a starter some day

4-5 - 6th or 12th man

5-6 - bust

7-8 - out of the league
hope this will be helpful