Data Transfer

I want to generate scripts to transfer data from one table to another in MS SQL 2000.

But, the dbs are not same and i have certains constraints for transferring data and the structures of tables are different, hence, i need flexibility to specify transfer for each column accordingly.

Is there some tool available for the purpose?

Depends, do you want to repeat this transfer as part of a java application over and over again or is this a one-time transfer?

If its the latter, you can always export to a CSV or SQL statement file and use a text editor to move around and replace pieces. If you need this as part of a java application, you'll likely need to code your own conversion tool.