hey guys, umm..im kinda new to the forums here, but i can figure it out.

i have a bunch of questions, but i want to start off with what i know.

for harmonics..i know the "pure" and easy harmonics you can get out of your guitar are at the 12th fret, 7th, and 5th.. and whatever is at the 18th = the 7th. whatever. but kinda going along with children of bodom (even though some of their music is synthesized..) how do you get a very high squealing sound from such a low fretted area on a low string..like the A string?

Ibanez GAX70 Elec
'65 Alvarez Acoustic
JCX Stargazer Strat Model
Marshall MG10CD
DigiTech Death Metal