NW 7.3 AS JAVA Export

Dear  Friends,

Need some input regarding the NW 7.3 AS JAVA export and import.

We are planning to migrate AS JAVA 7.3 system from AIX to LINUX.

My Query is while doing export SWPM will not ask any credentials, it will simple export the data (Correct me if i am wrong ?

While Importing which credential of Source system we have to provide in SWPM, to do import successful of source database ?

( In SWPM for 7.02 and 7.01 it ask for j2ee_admin/administrator but in 7.3 is there any additional credential we have to give while doing import by using SWPM.

Thanks & Regards,

Anil Bhandary