[TeamBuilder]

You could do it without turning off salary cap and without editing player positions... but it involves a long and tedious process of trading draft picks for draft picks and gradually moving up...

Ex: 2nd, 2nd, 3rd for Bengals 1st
Then trade that first for a lower 1st, 2nd, and 3rd
Then trade that lower first for an even lower 1st, 2nd, 4th
Repeat, repeat, repeat.

I've experimented with this to try and understand trade logic more... with the Titans I was able to get this team...

QB- Vince Young, Brady Quinn
HB- Adrian Peterson, Chris Johnson, Jonathan Stewart, Reggie Bush
FB- Brandon Jacobs, Lawrence Vickers, Lendale White (editied Jacobs after acquired)
WR- Calvin Johnson, Michael Crabtree, Desean Jackson, Devin Hester, Kenny Britt
TE- Greg Olsen, Vernon Davis, Jared Cook Jr.
LT- Michael Roos, Troy Kopog
LG- Ben Grubbs, Carl Nicks
C- Jason Brown, Leroy Harris
RG- Jeff Otah, Mike Pollack
RT- Dave Stewart, Phil Loadholt

LE- Elvis Dumervil, Javon Kearse
RE- Manny Lawson, Cliff Avril
DT- B.J. Raji, Jason Jones
LOLB- Daryl Smith
MLB- Jon Beason
ROLB- Keith Rivers
CB- Courtland Finnegan, Antonio Cromartie, Malcolm Jenkins
FS- Michael Griffin
SS- Reggie Nelson

Also did the same with the Cardinals defense...

LE- Darnell Dockett
RE- Tommie Harris
DT- Albert Haynesworth, Haloti Ngata, Glenn Dorsey
LOLB- Aaron Curry
MLB- Patrick Willis, Karlos Dansby, Lawrence Timmons, Gerald Hayes
ROLB- Shawne Merriman
CB- Nnamdi Asomugha, Darelle Revis, Dominique Rodgers-Cromartie, Antonio Cromartie, Brandon Flowers
FS- LaRon Landry, Antrel Rolle
SS- Adrian Wilson

WR's Fitz, Boldin, Calvin Johnson, Crabtree, and Breaston
TE's Olsen and Vernon Davis