MBP 2011 died and having problems reinstalling Mac OS

Hello,
Having problems trying to make my MBP start working again...
Tech info:
Early 2011 MBP, 10.6.6 preinstalled Mac OS X
2.3GHz Quad-core Intel Core i7
8GB 1333MHz DDR3 SDRAM - 2x4GB
256GB Solid State Drive
SuperDrive 8x (DVD±R DL/DVD±RW/CD-RW)
MacBook Pro 17-inch Hi-Resolution Antiglare Widescreen Display
Was full updated up to date 3-4 days ago, so probably it was 10.6.7 before the crash.
I am pretty new to Macs and english is not my first language, so please excuse me if i use wrong terminology. Thanks.
It is pretty long story, the problem is - i can not install Mac OS X and make it work. The at the moment description of the situation is in Part 6, so you might want to skip parts 1-5, although reading those might be needed to understand the source of the problem or some details.
The Story:
Everything worked great for about a month but then multi-language kernel panic windows asking me to reboot computer poped up. Reboot didnt help and it kept asking me for more and more reboots after like 1 minute after it logs in into Mac Os.
I had 3 programms(among others) installed: Kaspersky(fully updated trial), Parallels(activated a month age oem version, runing Windows 7 as a virtual machine without using Bootcamp) and virtualbox(activated 2 weeks ago, not being used or opened for ~10 days).
Part 1 - After logging into Mac OS 2 messages always pop'ed up:
1) Kaspersky couldnt lunch in previous Mac OS startup(not current)
2) Parallels message: Its time to choose either to use trial Parallels or to enter activation key. Thats really weird because it was activated a month ago, was fully updated and worked great every day. When i tried to activate it again it just didnt accept the key which was accepted last time: the icon was still grey and not clickable, rechecked 10 times at that moment.
Ok, decided to uninstall both Kaspersky and Parallels via Safe Mode. Safe Mode is working fine. Removed programms by dragging them from application folder to trash can. Worked fine. Logged into normal mode. No messages appear except the "Hello, you had kernel last time", but still Kernel appear in 2-3 minutes. Logging in 32b mode(by pressing 32 while booting up) doesn't help either.
Part 2 - Rebooted. Booted from boot DVD and used Disk utility - nothing is wrong.
Went to safe mode again. Found Kernel Log and it showed me that the source of the error was some file of VirtualBox(at least it has virtualbox in its name. Virtualbox itself, again, wasn't launched for like 10 days) located in /extension folder. Removed virtualbox program by dragging it from applications folder to trash. Worked fine, but those files in /extension folder weren't deleted. I am pretty new to Macs, so i wasn't sure if those are really VirtualBox programm's files or Mac OS system files, so i decided to reboot and check if the problem still not fixed.
Result: You cant boot neither in normal mode or in Safe mode. It just doesnt react on anything.
No backups. Great.
Part 3. Booted via boot DVD. Worked fine. Checked if disc was ok - it wasn't ok. Tried to repair - cant repair, suggests me to reinstall.
Made a backup on external HDD(have it atm, so iа you need any info i can get from that backup to help you guys understand what happened - ask and i will give it to you asap).
Erased internal HDD with zeroes(1 row), it still has 4 files on it(around 300 mb), probably those are the files copied from Boot DVD, but i am not sure.
Part 4. Tried to install Mac OS from boot DVD. File system is for Mac os with journaled option activated. Installation process starts fine but at some point(around 25-30% while telling me its around 30 minutes left) the error message appears telling mу the installation couldn't be continued because it cant copy some files from DVD(no particullar files mentioned). Advising me to reboot and try again. Same thing happens always.
DVD disk was never used and even not unpacked before, looks fine...
Part 5. Inserted the boot DVD in another mac, made a copy via disk utility in mac os(without booting using this disc), copied it to external drive where the backup is. So there are 2 files on external drive: backup.dmg and starupDVD.dmg.
Pulled in the external hdd to MBP and tried clicking option key to choose him to boot from HDD. Nothing happens, just mouse appears without any windows where i can choose the boot option. Weird. Tried all 3 usb ports, same problem. Tried to put the DVD disk and click option key - both mouse and window appears, but only DVD boot option avaivable.
Tried to reset RAM by clicking Command-Option-P-R keys. Reset went fine(the sound and so on), but it didn't effect on anything.
Part 6(this very moment): So here i am. Have erased internal HDD with 4 files in it(around 300 mb, dont know what), boot DVD which came along with MBP with 10.6.6 MaсOS, external HDD with the same DVD and backup.
Disk utility says my internal HDD is ok.
Clicking option key doesnt make my MBP see external HDD while it is plugged in any usb port, only mouse appears. Same option key sees dvd disk if it is plugged in and boots normally.
You can see and work with external HDD if you boot from boot DVD.
Installation process starts both fine on internal and external HDDs. On internal it crashed with "cant copy files" message at ~20-30%(~30 minutes left), on external the screen just turns grey with moveable mouse on it without any messages at around 30%(~40 minutes left).
External HDD - Western Digital My Passport Essential SE 1TB USB 3.0
Internal HDD - 256gb SSD which came from Apple (sorry for calling it internal HDD)
Think its pretty much it...
What should i do to make this thing work? Pretty much desperate already.
Thank You for any help.
Sincerely yours,
Alexander.

Just one more thing - the description of what i did while first Kernel appeared:
Happened 2 days ago. Wasn't turning it off for like a day, only sleep mode by closing it. Worked fine all day, wasn't doing anything, except for checking mail 2-3 times and having windows 7 virtual machine opened but doing nothing, everything was going fine. Then closed it without turning off.
Opened 3-4 hours later, everything was working fine for 30 minutes of checking mail, then Kernel appeared. After that pretty much everything i did is described in part 1-5.
Note: all the time MBP was connected to internet via wifi, so updates to both MBP and virtual machine of all programs were possible.
I only shared downloads and desktop folders, so windows couldn't have access to system folder of Mac Os.
Hope this might help...Thanks again.

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