Creation of GL Master Records

Dear Gurus,

We are currently on R/3 3.1I and are in the process of doing an fresh installation of ECC 6.0.

To upload the GL Master Records, I had planned to use LSMW, but how do we down load the data from R/3 3.1I for the upload into ECC 6.0 using LSMW. Would be great to know the tables that have to be downloaded.

If there is anyother way that we can do let me know.

Thanks in advance.

regards,

Raj