I would advise performing a full WiFi update FIRST, then using Smash Stack to install HBC. You may not be able to install Priiloader immediately, as currently the installer requires a patched IOS, and its against the rules for us to tell you how to get one of those. However, provided a small bug in HBC (which doesn't affect too much else, so don't worry about it) is fixed soon (which hopefully it should be), there will be a new installer which doesn't need a patched IOS. There is also no point installing Priiloader before an update, as an update would wipe it out anyway.
We do not support installing WADs here, if you mean pirated WiiWare or Virtual Console games. If you mean custom channels, well, we can't really help much with that either, because the tool used to do so is the same as for piracy, and we are VERY against that. We are also against disc backups, as these are very often a euphenism for pirated games. Please read the rules.