Alright, so ive been trying to install BT3 to the HDD of my Macbook pro (Intel)

ive been following one of the tutorials I found on this site,

and whenever I try to boot up BT3 after I am done finishing the installation progress...

I got this error
Please append a corrent "root=" boot option
Kernel panic - not synching : VFS: Unable to mount root fs on unkown-blocl(8,1)
How would I fix this`?