That has no relevance. It just shows how to change some burned-in router specific paras. Here we are querying whether some user-specific paras are burned-in as has been suggested. It was suggested that you carry out a test to try and confirm this, not asked how to change them if it proves that they are burned-in. in which case your method would be highly appropriate.
1999: Freeserve 48K Dial-Up => 2005: Wanadoo 1 Meg BB => 2007: Orange 2 Meg BB => 2008: Orange 8 Meg LLU => 2010: Orange 16 Meg LLU => 2011: Orange 20 Meg WBC