How to change the template of a solidworks part or assembly file?

How to change the template of a solidworks part or assembly file? Can the templates be changed in a step or iges file which once had another template?
3 Answers

go to Tools/Options; Select "File Locations" and then "Document Templates". You can add there the location of your new templates (part/assembly/drawing)
Next go to "Default Templates" and select your new templates for each category (part/assembly/drawing)
Done!