I am going to be migrating data FROM a MS domain to a OES11 cluster (for once it's not the other way)

The users in the MS Domain have accounts in the eDir, but it's not one to one. We used IDM to rename the users from their naming convention to our naming convention (JSmith to SmithJ01 or something similar) We do have the original user ID stored in eDir in the "personal title" field.

How do we move the user data (approx 1TB and 1200 users) automagically over to our OES cluster and into the user's home drives?. We have admin on both sides, but would rather not work this manually.

Like I said, an unique opportunity....