project Server SQL Server tables messed up

[Newbie]

Hello,
Some weeks ago I uninstalled Project server 2002, I uninstalled SQL Server
2000... and installed Project Server 2003.
Now, when I make a query directly on SQL Server tables : MSP_RESOURCES,
MSP_ASSIGNMENTS and MSP_TASKS (with join) I extract a lot of strange
assignments which are a mix of several projects I created with 2002 version
and with the new 2003 version.
Some old Administrative tasks are assigned to a resource in a project plan
(not the administrative one ??? I don't use any Administrative project
anymore)
How can I delete definitively these ghost assignments?


Thanks for help,

Newbie