Here is my "mod":
http://img850.imageshack.us/img850/4128/sbkp.jpg
I used this Jack:
http://www.aliexpress.com/item/3-5mm-panel-mount-stereo-jack-with-soldering-wire/760576564.html
Great Jack, worldwide shipping, but you need to "damage" your driver frame to get it in (this does not affect the sound).
Aslo the seller sent me 3 of em' despite I payed for 1 only...
More one thing I want to mention, the pads im using is the HM5 pads, with the sponge of the original pads underneath.
This makes the sound more "bass heavy", the headphones looks better, its more comfortable, and I prefer it. (without the original sponge underneath the trebel is a bit painful...
You need to use some force to get it on, but when you manage to succes, this is perfect, and seal great!
I bought them from here: (this is one earpad only so you need to order two)
http://www.mp4nation.net/brainwavz-earphones/brainwavz-hm5-spare-earpad-1pc
Good Luck!