Please clarify. Do we want to keep both of them on the same disk or on different disks?
Please continue the thread you open. :)
Anyway, as long as the index info aren't in the same disk as the data info, then you should be OK.
Assuming that you have already separate them, put the new datafile in the same disk where is the first one.
Ramon Caballero, DBA, email@example.com