Add custom fields to Load campaign from list siebel

Hello,

I have faced the requirement to add custom fields to campaign respondent load.

We are currently loading respondents to campaign using list which is before loaded to Siebel with csv file.

The process:

1. List import to Siebel

1.1 Marketing Administration -> Import -> Create New Job -> Point to input csv file -> Specify Mappings -> Activate

1.2 Contact list is loaded to List Management

2. Create Campaign under Campaign management

2.1 Specify just created list under Design -> Segments/Lists

2.2 Some more stuff and than Load Campaign

Is there some way to add custom fields to this import, so that I can add values to text file and afterwards see them as values in custom fields under Campaign -> My Contacts/Prospects ?