check it out:
YouTube - Recording guitars with a DIY Isolation Cabinet (+ how to build one)

This is me explaining how to build and how to record with an isolation box.
I built it in fall 2007 and I'll soon have to move it elsewhere, so I thought I'll film this tutorial. I hope you enjoy.

Here are some songs that I recorded with the isolation box. Click those if you want the hear how it sounds within a full production context:

E.g. this one: Adagio for strings (with clean & mellow sounds):
Purple Organ (70s style rock song)
Riverdance theme (beginning is with clean sounds, later on there is a fully cranked, Plexi-Esque Amp lead sound)

feel free to ask questions etc.