I would think this would conflict with the 3 million max contribution via trade rule, but perhaps not since the team isn't really sending the team a check.
In a complicated bit of league-permitted bookkeeping, the Sixers made sure they had sufficient room to sign Elton Brand by renouncing their rights to unrestricted free agent Kevin Ollie and restricted free agents Shavlik Randolph, Herbert Hill and Louis Amundson. They are also paying the salary of Calvin Booth and about two-thirds of the salary of Rodney Carney, traded to Minnesota in another move to create cap space.