BB Curve :: 8520 Went Dead After Installation Of Program?

And next to that,, may be the answer to my problem is already on this forum, I'm sorry for that too, I've searched and searched, but no (working) answer, I hope if this is the case you can kindly redirect me. I hope you'll forgive me for this.

Having said this: Today I wanted to install another browser (Opera for BB), since I don't have (and need) a BIS/BES account I installed the program through the Desktop Manager (6.1). It worked ok, but the installation seemed to be hanging. The DM was waiting for the divice to reboot I guess? My phone at that point wasn't doing anything. Only a red LED was blinking?

Now, I did something stupid may be. The DM and my phone were already for quite some time in this state. But I HAD TO leave, so I disconnected. In the assumption that my phone could be turned on...I pressed the button to get it on...nothing (of course), removing the battery and putting it back....nothing. Only the red LED light blinking four times in intervals.

After some searching on different forums, I understand that my phone cannot reboot, probably because the OS is now messed up.I've tried to install an update. When connecting my phone to the computer by USB cable, both the Device Manager and the Desktop Manager recognize my phone. The DM detects a connection problem and offers to update the software of my phone. My hapiness (this might actually work!!) was diminished when the installationprocess was canceled, because (SURPRISE!) it couldn't connect to my phone to install the update properly.

Update: I also tried this: www.blackberryvsiphone.com/blackberry-troubleshooting/how-to-restore-a-dead-blackberry . But no luck there, It didn't produce a working BB.

Update2: Tried it second time, left the phone for a whole night...nothing! I'm seriously considering throwing the BB out of the window...

More constructively: what to do? Turn to BB website and the support forum for help. I really don't know where to begin..