Do you need to unscrew the 4 tiny philip screws to get to there?

It's possible.     http://www.head-fi.org/t/601873/sennheiser-hd558-cable

Hello to all, i just got my HD518 as my first pair of headphones, quite excited actually.  I was wondering if there's a step-by-step guide to open them up, i really wanna take out the twist tab thing so i can use any 2.5mm cable.   thanks guys!

I just got these headphones but i do require to use it for gaming so i need to attach the mic.  I see that now i can take out the plastic tab, but i'm really new to this headphone game, can someone provide a step-by-step DIY to disassemble please?  thanks guys!