I'm the Portaller. I'm a computer hobbiest, Linux user, and occasionally do things like triple boot DOS, 98, and Debian just to see if I can (do not, by the way, try to use a DOS installer that recognises FAT32 partitions). My specialties are working with software, and weaknesses include removing CPU cooling fans. Hello.
It refuses to run on those IOS's because the earlier versions of cIOScorp scooped out your Wii's innards and turned them into delicious Scrambled IOS Breakfast, which confused the crap out of their installer and gave TT all sorts of bizarre errors to scratch their heads over.
Limits are temporary, the boundaries of which are to be pushed by diligent study and application of oneself to the problem at hand.