It is against the site rules to post external links to guides, even to say that they suck. We know they suck. That's why we wrote guides that don't.
If you've been hopscotching from guide-to-guide, the first thing that I would suggest is for you to remod your system with our guide. I have a link to the Softmod Any Wii guide in my singature.
Chapter 3 of the guide gives you three USB Loaders and other apps. Each of the three loaders supplied should work with the latest versions of Dios Mios and Devolution.
We have guides for each of those as well. I have DM guide in my signature, and probably should add Devo as well, but you can search for it if you want to go that route.
Each of DM and Devo guides assumes that you've used Mau's Softmod guide first. So don't skip that step assuming you're good. Because I would wager money that you're not.
If you think you are and want to try to prove me wrong, post a syscheck (directions on how to do that are in my signature as well).
See if any of that helps.
If you have questions, reply in the guide that you have questions about (and posting a syscheck in the question reply probably won't hurt either, since that is likely going to be the first thing you're asked).