Data Transfer Workbench - importing invoice text lines

my experience with DTW is limited, we are using SAP2004A with the latest patch.

I need to import Invoices to SAP using DTW and some of the source invoice lines contain line comments, They are long text and my client wishes to have them incorporated in to SAP as text type lines. I however could not see a way of doing this using DTW.

have I missed it somewhere? is this a shortcomming of DTW?

if so has anybody being able to perform this task in any other way?

any help is appreciated.

Thanks,

Indika.