SSIS - Extract subset (n) columns from table at time

I have a DB2 table with over 100 columns of data (and 30+ million records) which I need to load into SQL Server table.  Instead of trying to load all data at once, I thought it would be more efficient to do following:

• Extract first 20 columns of data from DB2 source and load it in SQL Server
• Extract next 20 columns of data...and load into SQL Server
• Repeat this until all 100 columns have been exhausted

Does SSIS have some type of SPLIT transformation that would allow me to do this, or would I need write script component?  If so, does anyone have example which I can follow.

Thanks, any help or suggestions would be greatly appreciated.
MsBecca23