Multiple line items entry using CATT!!!

Hi

I want to enter multiple line items in an FI document...I have defined the GL account, amount & tax codes with separate parameter names & I exported the variant to an excel sheet.....I am able to post each line only as a separatedocument...I want to be able to combine like 30 line items into one single document....

Is that possible in CATT????

Have anybody had this problem.....

Thanks

Regards

Morgan