In Siebel vanilla there is an undocumented BS named Read CSV File.
This BS is very useful especially for testing. Using this BS you can read a file based on Integration Object and you can use it for unit testting purposes. Also i can be an alternative to load data into Siebel. You can find detail information about this BS below,
http://blogs.oracle.com/siebelessentials/2008/10/encounter_with_the_read_csv_fi.html
