Within Access, you could create a new linked table. This will use ODBC to connect to your DB2 database. If it is a small data volume you can just open up both your old table and your linked table and copy and paste data (or manually type in data).
The other way is to export the data into a flat file and then use the DB2 import or load utilities to load your table.
Let me know if you need more info on either option.