Hi Darren,
If you wish to create an export with your own broker’s settings then, yes, you will need to do this prior to the export. This allows you to load in these settings in the ‘MT4 Export’ screen so they are applied in the exported data.
The general procedure doing this is:
1) Follow the instructions for generating your .mt4info settings file for your broker. Once you have done this, you don’t need to do this step again unless your broker has changed some fundamental settings (such as minimum lot size).
2) Select ‘MT4 export’ and load your new settings file. You can save these settings as default so you don’t need to load them again before each export.
3) Start your export. When it is complete, the exported file will contain all your broker’s information.
Hope this helps.