Use the Progress SQLSCHEMA utility to capture the existing schema of the Progress database into a text file. Edit the text file appropriately to make any changes needed for the version of MySQL and the MySQL database engine you are using. Be careful to consider the implications of which MySQL engine you choose, there are both costs and benefits associated with each of the engines. While MyISAM might be very attractive from the conversion standpoint, it can be a major drawback later if you need features that it doesn't have like transactions or DRI enforcement that Progress provides.
-PatP