Here is a trade idea to help improve the scoring of the second unit for the Celtics:
Celtics get:
John Salmons
Bulls get:
Scal, Giddens, and Williams
For the Celtics, we get a player that has the ability to score and make his own offense. His salary is only for two years, so the Celtics aren't stuck with him for the long-term.
For the Bulls, they get Salmons contract off the books for next year, and the three guys they are getting each have expiring contracts. This will allow them to make a run for one of the big free agents next year.