Hey Good News. I did some searching online and found an item based on what dr34m3r mentioned about preloader not recognising the title of the updated homebrew channel. So i came across a download at this site:- Preloader v0.29 - JODI Patched - GBAtemp.net I downloaded the file then installed it into the wii, then i was able to click on installed files which then opened up the homebrew channel. I then reinstalled preloader .029 which then got rid of the corrupt file screen. And it all seems to be working OK.
Thankyou to everyone for your advice especially dr34m3r for the fix.
I'll definately take your advice and not follow "random crappy guides on random crappy websites". I will come to this site for any advice and tips next time.