Our softmod guide will update your console to 4.1 as part of the process, so there is no need to mess around with trying to do it from a disk unless you do not have internet access. The reason for the update is to be able to use a "brick protection" program called Priiloader, it is not to be able to play games.
There are system files called ios files that enable the wii to perform it's many functions including playing particular games. They are installed when one uses an update, but can also be manually installed if the user has softmodded. It is better to manually install them since the updates will also destroy a persons softmod and in some cases brick their console.