how would one attempt to replicate the sounds of Isis? fx/amp/guitar etc, im just talking about the essentials here...
Aaron - Singer/Guitarist:
Guitar: Black Tele with a humbucker in the neck position
Amps: Sunn Model T (Guitar Head)
Sunn 1200s (Bass Head)
2 Mesa Cabs
Effects: Line6 Dl4
Moogerfooger Ring Modulator
Boss Rv-3 Digital Reverb/Delay
Maxon 881 over drive
Snarling Dogs Wah
Boss Ge-7 Eq
Boss Dd-6 Digital Delay
Boss Ph-3 Phase Shifter
Boss Tu-2 Tuner

Michael - Guitarist:
Guitar: Natural sun burst Les Paul
Amp: (wasn't paying attention)
Effects: Boss Rc-20 Loop Station
Boss Rv-5 Digital Reverb/Delay
Boss Rv-3 Digital Reverb/Delay
Boss Ge-7 Eq
Boss Tu-2 Tuner
Dunlop Ts-1 Tremelo

Bryant - Guitar/Electronics:
Guitar: (wasn't paying attention)
Amp: (wasn't paying attention)
Effects: Boss Rv-3 Digital Reverb
Boss Dd-6 Digital Delay
Boss Ps-5 Super Shifter
Boss Ps-3 Digital Pitch Shifter
Boss Ge-7 Eq
Boss Tu-2 Tuner
Fulletone Full-Drive2

Jeff - Bassist:
Bass: Musicman Stingray
Amp: Ampeg
Effects: Mystery pedal (Far left)

Taken from http://www.tooltabs.net/forum_two/viewtopic.php?t=6594 . I'm interested in getting a kinda Isis tone too. They play in very low tuning (can't remember exactly what though). Lots going on there anyway, what with three guitarists and lots of subtle effects.