Upgrade scripts AX 4.0 to AX2009 Upgrade -Post synch step

Following are steps to write upgrade scripts :

1. Get a summary of field Id changes between 4.0 and 2009 from SQLDictionary Table in both version.
2. Create a copy of SQL Dictionary table from 4.0 Version  and import this Table in AX2009 Database.
3. Now create a view to compare the field id for fields with same name,same Table name ion both versions.
4. Now modify ReleaseUpgradeDb3X_Module or ReleaseUpgradeDb4X_Module and add the old field Ids for addPostsyncsjobs method.
5. Now run the PostSync step . This will resolve the field Id difference issues.