To make the dollars work the only piece you could not include would be Bledsoe and he is the piece you would most want to include.
I don't think you can trade them to the same place, but you could trade them both.
For example, I think both of these trades may be available and both seem like they would serve a rebuilding purpose
SAS - Pierce
BOS - Jackson (expiring), Leonard, Blair (expiring)
LAC - Garnett, Bass
BOS - Bledsoe, Odom (expiring), Butler, 2013 1st
Boston should then try to find a team for Terry, maybe to Indiana for Augustin who is expiring.
Boston post trades would be in rebuilding and would add Leonard, Blair, and Bledsoe along with the extra first for more young talent to pair with Rondo, Green, Bradley, Lee, Sullinger, and Melo. Butler has 1 year after this one and would be a valuable expiring contract. Augustin, Odom, and Jackson are expiring and could either be moved this year or come off the books to free up cap space.
Boston next year would thus be essentially
Guards - Rondo, Bledsoe, Lee, Bradley
Wings - Butler, Green, Leonard
Bigs - Sullinger, Blair, Melo
Plus the 2 firsts and room for a big time free agent (maybe Josh Smith).
Clear tank mode but not a bad start to rebuilding by getting some real talent.
EDIT: Boston would obviously need to add a real center to the roster, there is cap space to do it, perhaps Dwight might like to come here to play with Rondo and I'd rather have Dwight than Smith. Ideally, Smith and Dwight could both come here, one on a sign and trade (so we send Butler, Sullinger, and a 1st to Atlanta for Smith and then Dwight just signs here). That would be an optimal off season following the proposed trades I have above.