How can I 7 string my 6 string..?

sorry this is probably a stupid q =)
I love korn, a lot, and need to play their music, and music with that deep n’ kinda thick feeling… (or as good as ye can make it with this)
I don’t mean how can I cram 7 strings on it =), but what would be the best way of arranging things etcetc… ?
And tuning, I’m guessing these low b’s would not be ideal on these sort of guitars…
I know this won’t sound all that great (especially me playing stuff ;) ), but don’t have money to be buying guitars…

so anything you can tell me to help… (?)

sorry… i normally stick to pianos so i’m kind of a layman here =P
thankyou… =)