priiloader 0.4 cant launch hbc 1.0.8 because the hbc 1.0.7 and 1.0.8 got a new title from 1.0.6. Priiloader 0.4 tries to launch it at the old title, so it doesn't work
does priiloader 0.4 come up with an error when it's trying to launch bootmii ios?
I would suggest to stay at priiloader 0.4 and hbc 1.0.8
also, make sure you go over and post an intro in the introductions forum
just tried loading bootmii ios from hbc 1.0.8 install through priiloader 0.4, and it worked
make sure you have the bootmii folder with 3 files (ppcboot.elf, armboot.bin, and bootmii.ini) on the root of your sd card)