Please follow this step by step tutorial: http://www.wiihacks.com/recommended-...d-any-wii.html
Read the tutorial a few times very carefully. Most problems are due to missing a step or not following the the tutorial as written. For the softmod, use a 2GB SD card, best would be a SanDisk. Your Wii will need Internet access; but to avoid accidental update to 4.2 turn WiiConnect24 off: Internet ON; WiiConnect24 OFF.
To keep your HBC and homebrew apps, your can skip the HBC install part of Step1.