Win7 x64 Installation on late 2007 MBP+Mountain Lion

Question

Dear All,
As a long time mac and bootcamp user, I've never expected to face this problem but I've been trying to do this for 3 days.
I'm having trouble installing bootcamp (win7 x64 ultimate) into my late 2007 MBP (2.4GHZ core 2 duo)
Pretty much use the bootcamp assistant from start to finish, tried using install dvd and create boot-able USB stick (by changing the plist.info on the bootcamp assistant package, as my MBP isn't supported.)
With USB stick created by bootcamp assistant, my mbp just simply won't read it even during startup and rEFit startup.
Sometimes it goes into the blank state and says no bootable device.
With win7 install DVD, whenever I use built in superdrive, it got ejected after 2-3 mins,
When I tried using Samsung external dvd burner/player, in place of who-knows dead superdrive, it went into blank screen with only a dash blinking (just like when the first time you start a PC) then disc stop spinning after awhile.
Burned few copy DVDs from extracted ISO (from the orginial install disc) and came up with same results
Recent changes, current condition,etc:
- Changed the stock 160gb harddrive into WD500GB blue scorpio.
- Installed fresh OSX Mountain Lion downloaded from App Store (was Lion) and updated everything.
- Had the very same win7 on bootcamp 3 installed on snow leopard few years ago and keeping it even with Lion (the exact same dvd!)
- Superdrive cannot be used to write but can read normally (install DVD shows up normally in OSX environment.)
- With USB created by bootcamp assistant, rEFit shows "legacy booting" and can't find files inside the USB
- Installation is working flawlessly on my 2011 iMac.
- Can still boot into bootcamp on old internal stock hdd (using external case)
- DVDs burned are Verbatim DVD-R and Sony DVD-R, both are top brands.
- Burner I tried to burn them are 2011 iMac's, 2012 MBP's, Samsung external dvd burner (all fail to boot on my 2007 MBP)
- Tried the method to create usb stick on windows 7, still can't boot.
- Burned DVD using Nero and alcohol 120% on windows 7, still fail.
I wonder if you guys can help me, I'm a designer and I really need to install Corel Draw on bootcamp so I can work on some CDR files on my MBP. And other stuff such as office's finance control program that can only work under windows.
Thanks in advance!

Answer 1

Found a workaround, to sum it up, it's pretty much my dead internal superdrive (as for unbootable USB, that's still a mistery). What I did was moving the HDD to my 2012 MBP and install from there. The problem is now that since I installed it on another machine (with ofc all different hardwares) I got blue screen whenever I tried to start Windows7 (in 2007 MBP after moving the HDD back there).
Next step will be replacing the superdrive on 2007 MBP with 2012's. Or if someone got a suggestion like installing the drivers via target disk mode etc, please advice