There are many tools and scripts out there to copy multiple DL's (Distribution Lists) from one 5.5 org to another org (AD). However, if you come across a situation where you only need to copy one Distribution List here is a quick method. You can basically log into the Exchange Org using Outlook 2003 and choose the DL from the GAL. Then expand the group membership and copy all the members to the AD screen that you would use to create a new DL in AD.
