As long as they did not Bitwriter lock the unit (some places do that specifically so you can't change the settings), you can do it yourself but it can be a bit tricky if you have never done it before. It's not rocket science by any means, but you have to make sure to take your time. If you change the wrong option, it could lead to multiple other issues. If you can live with it til you can get it in there then I would. Otherwise do a quick search on google for the installation manual for that and it should give you the programming instructions.