Check out Stephen Carpenters Sig model.

What is the tuning to the 7 string baritone?
Schecter C-1 BlackJack
Peavey 5150 II
Ibanez 25W "Tone Blaster"
Fender Starcaster (Not the vintage kind, the Wal-Mart Value kit kind"

If Dimebag22 was a pie, I would cover him with whipped cream and eat his insides...
Stephen typically doesn't use a "Standard" 7-string.

He'll take the low B off and install what would be a high A, but since Deftones tune down do drop C I imagine its a high G.

Don't take this for granted as I've done little research so feel free to fix on what I've said.
Hmm, that's a bass and almost a guitar there, if a lower string is added
Otherwise it'd would jsut be like a 7string guitar, except longer scale neck and everything else..