Macbook Pro 2011 Thunderbolt display problems

Running through mac all three screens work fine. However through Bootcamp in Windows 7 I'm having problems with the Thunderbolt display via hdmi - as many others are experiencing too.

I have a Macbook Pro early 2011 with a AMD Radeon HD 6750M graphics card. I have two external displays, one 19" monitor and a 21" LCD tv. I was sometimes able to get the TV to display through the Thunderbolt, however through the AMD Catalyst Control Center I disabled a monitor whilst I had the LG tv connected and now whenever I connect the LCD TV all 3 screens go black. It's an absolute nightmare.

I've taken a look at this article http://www.sevenforums.com/graphic-cards/169831-reset-display-settings-monitor-n ot-plugged.html and I bravely tried deleting some of the items here, but none of them are able to delete; I am logged in as an Administrator.

Before it was a matter of luck if the LCD TV would work, it's fine on startup; the windows 7 logo starts up with it, but when login comes round that's when the windows drivers take over and play havoc.

Now that I messed around in the advanced settings through AMD Catalyst Control Centre and selected to disable the macbook pro screen when connected to the LCD tv via thunderbolt (when I was lucky enough to make a connection) I don't think it will ever work again.

The problem is the screen must be connected, I'm unable to delete the LCD screen or anything unless it's connected.

I know many people have problems with the Thunderbolt display via Bootcamp, so I'm hoping there's a helpful genius out there.