Hello,
You can control the way templates are listed for each technology, with the ".tpc" files.
Basically, there are up to 4 categories in this file : Load, Integration, Reject and Stage.
Each category can be configured with conditions (usually the Rdbms technology), and under each condition you can drag and drop Templates to order them or add specific ones.
Note: you may want to create your own .tpc file (copying an existing one) in order to avoid that standard tpc files override your specific modifications.