You can use the Drupal 7 version of the CCK module to migrate data from a D6 installation to a D7 installation.
For assistance, take a look at Migrating D6 Content Construction Kit (CCK) to D7 Fields
You can use the Drupal 7 version of the CCK module to migrate data from a D6 installation to a D7 installation.
For assistance, take a look at Migrating D6 Content Construction Kit (CCK) to D7 Fields