Perfect tutorial on Micing and reamping an electric guitar!

I've asked for advice here before on this but this is slightly different. I have a low end Ibanez acoustic with preamp and have been Micing it with an AT3035 (the done away with version of the 2035 from what I understand). I've been recording straight into my Firestudio with the Ibanez' preamp plus recording a few inches from the 3035 with the mic being in between the 12th fret and sound hole.

Hi guys!

A few days ago I heard a engineer saying that the best way to record the guitar amp is putting the cabinet (speaker) up something like a rack, chair, etc.

Is it really true?
Why?
Is there some acoustic problem on this?

Thanks everyone, and sorry for my english.

Hugs
Davi

Drums:

4 piece 1970 ludwig with old zildjian cymbals, for indie rock/reggae style

Recording chain:
PreSonus FireStudio (8 preamps )
Sonar 8.5 (thanks recording.org!)

My mic options:

I'm new here, so forgive me for being a bit green ;)

Question:
Is there ways to Mid-Side Stereo Micing without a Bi-directional or Figure of 8 microphone
Alternate techniques, to accomplish full/warm sound.

Tracking:
Acoustic Guitar

I finally can record stereo drums but need some advice on which specific mic to put where. I have anSM58, a Sennheiser e835, an MXL 990, and an MXL 991 condenser. I have an ATM 25 on the kick, so that's taken care of. Just trying to figure out which mics should be left and right, which one I should put on my rack toms, and if I should put one directly overhead or on the snare. Please help!

Hello all! I will be recording an original composition of mine and I'm lost on how to mic it with what I have...

The performing ensemble will be:

(solo voices)
- Soprano
- Alto
- Tenor
- Bass/ Baritone

- Viola
- Piano (9 foot grand)
- Percussion (mallet- vibraphone, chimes, marimba, bass drum and various unpitched metals)

Hey guys!

I'm having trouble getting a natural sound for an Upright Bass (contrabass) in a live room with drums. I've been Micing the bass and distancing the player from the drums by 10 - 15 feet, i'm not an isolation junky so I don't mind getting the tracks a little messy.