Alright it seemsbe booting, could be a boot loop though

Edit : it's working I'm on the home screen of cm9

You don't know how much I love you right now thanks so much for all the help (I didn't even need adb, it just booted normally 0.o)

Keep your fingers crossed :)
Edit: glad you already solved it.
You're welcome mate :)

Sent by my fingers to your head.

As I said, overvolt by 25 to hopefully prevent the phone from freezing again.

Or simply do flash a stable ROM. I would prefer this as I don't like to freeze my phone and brutally pull the batt

Sent by my fingers to your head.

I'm trawling through pages and pages of ROMs I think I will stick to stable ones now

If you want sense, try endymion, by far the best.
No sense - reaper, fastest ever.

Just my personal opinion.

Sent by my fingers to your head.

I may have not the thread in its entirety..

But did you try VolumeUp + VolumeDown + Power button combination.

Which can often reboot a hung/stuck phone?