hey man, welcome, i was new to this site couple weeks ago and i spent the whole day looking for a good source in modding my wii. I have a 4.2u system and bought my wii about a month ago. I used Messie's guide on this website (tells step by step) and im pretty technically r-tarded lol.
1. Go to search on this site.
2. click advanced search.
3. scroll down , username search-type in messie
4. it should be the first or second forum says 'modding 4.2 systems or sumthing.
5. if your wii is older there should be a link there also.
should save you sum time looking through all the forums for a reasonable guide. This one works good