[T-Mobile Samsung Galaxy S II SGH-T989] Corosus:
UPDATE: I was able to fix my phone by flashing a stock ROM via Odin, which failed, but it wiped out CWM, so I could access the default recovery, it then successfully wipe my cache in seconds. After that, I was able to follow the custom ROM instructions properly and I am now using the custom ROM!

Random Pieces of Information:

Phone: SGH-T989D

SD Card: 8GB

Carrier: Koodo

Backups: CWM v6.0.1 Backup, ROM Toolbox (Version unknown) App & Data Backup

After browsing for a bit, I finally decided to take a shot at flashing a custom ROM to my phone. I decided to try AOKP http://xdaforums.com/showthread.php?t=1828728&page=430 I downloaded all the files, and started copying them over, but had to leave for around 30 minutes, when I came back, I got ahead of myself and went straight into flashing the ROM without flashing the rest of the listed things, or wiping the data. Immediately after I started the flash, I realized I had done wrong, but I figured pulling the battery would only be worse, so I left it to finish, then rebooted, hoping for some strange reason, it would be fine. It showed my custom boot animation that I had installed on the Koodo stock ROM via ROM Toolbox (Which hadn't worked until then), but after that it just went black. I waited for ~15 minutes and after that, I pulled the battery since I figured it wasn't going to do anything.

In hopes of recovering, I went back into CWM and went to restore, it went through everything until it hit "Restoring cache...", after waiting for 30 minutes, I pulled the battery and went back into CWM to try and wipe the data, it has now froze on "Formatting /cache...". I have now stopped doing anything to it and came here for help.

I realize that around 90% of the things I did were really stupid, but I'm a very independent person who doesn't like getting help for anyone. Now I've hit the point of desperation, since I definitely don't have the cash for a new phone, not even an old school flip phone.

So, I have turned to this forum, ready to follow instructions to the letter, in hopes of fixing my phone. My primary goal is to get my phone functional without paying a penny, so if that means covering my tracks and making it look like I never did anything to void my warrenty, instructions to do that would be great, so I can get it repaired via Koodo. If it possible to get it back to factory defaults and lose every piece of data I had, that would be wonderful too. All I want is a working phone again, so if someone could guide me by posting instructions on how to fix it, or a link to a thread that would help me, that would be great too.

I found this thread, but I am not familiar with what exactly "SoftBricking" is, and whether my situation is refered as such, so if the linked to thread would apply to me, a quick post saying so would be great too. I just don't want to do anything without someone with some sort of experience to advise me, so I can avoid further failure and damage.

EDIT: I decided to try and see if I could at least get into Download Mode, as described by the SoftBricked guide. So here's what I did:

Removed and inserted battery.

I downloaded the listed drivers, ran them, it told me they were already installed and asked me if I wanted to install them anyway, I said yes, just to be safe.

I then held down Vol+ and Vol- and plugged it in. At first, I saw a large grey battery with a spinning circle in it, and felt a vibration, then it went black. Shortly after, it was a smaller battery icon, that was pure white, it then went black again. Windows said it was installing the driver. After a little bit of waiting, it said it failed to install the driver.

I don't know what to do now.

EDIT2: When I try to power on the device without holding any volume keys, it shows me the picture that tells me my device name, then the Koodo loading screen, then starts the default Samsung Boot Animation, but freezes half way, makes a whining sound, then stops and reboots again.

EDIT3: I booted into ClockwordMod Recovery, and mounted my phone, and I am able to view the files on it via my PC, if that means anything.