You probably got a nice reply to your introduction post. It is full of links to get you going. You will need to do some reading. Since you are already softmoded and have a usb hd you may be able to do any other mods through that. You will have to figure out how your hard drive is formatted though. I suggest doing a lot of reading on the things you are interested in doing with your wii, fully understand what your set up is and what else you would like to do with it. Posting a syscheck here will help us understand what you have to work with as well. How to post a system check
EDIT: I see that you did not get a proper welcome from a mod yet, just Oddgriffin wishing he could have picked your pocket instead of whoever did! Look through those introduction posts and find one that vinatec or narse responded to, they have great links in their replies.