Just follow this tutorial:
[Only Registered Users Can See Links. Click Here To Register].
Read it through a few times and make sure you understand before starting. For the softmod, use a 2GB SD card, SanDisk is best. While Internet access is used during the softmod, WiiConnect24 should be off to avoid a problem with N=Bannerbomb and to prevent accidenta; update to 4.2. During the softmod,
Internet ON;
WiiConnect24 OFF.
If, after reading the tutorial through a few times, you have any questions, please post them in the associated forum thread. Good luck with your softmod.