[Q] Device ROM/Soft Bricked problem! Help! - Android Q&A, Help & Troubleshooting

I've spent some time researching how to root my phone for quite awhile now because there was almost no guide for my phone to be rooted. I have a Samsung Galaxy Admire 4G (Model SCH-R820) connected to MetroPCS with a 16 GB external SD card inserted. Also it had Android 2.3.6 installed on it. With some hard research I finally found a forum that I followed to root my device.
The forum actually did help to root my phone which I couldn't believe. :laugh: I installed the .apk file with File Explorer and installed Framaroot, then I opened the app and I rooted with SuperSU as instructed in the forum. The whole process was successful and I downloaded a app to determined if my phone was really rooted which later said positive that my phone was rooted. After less than 2 hours of my phone being rooted and having fun with it, I saw thing about custom roms and I liked the ideas of installing a custom rom. I installed a app called "Rom Manger" and it said I needed ClockWorkMod Recovery or ClockWorkMod to be installed to be able to get the custom rom. My device was NOT supported and taped the unsupported device selection and it prompt me to say if I had ClockWorkMod Recovery MANUALLY installed. I didn't know what that mean't and selected "YES" which I would regret later on. I then selected "Backup Current ROM" and it restarted my phone but I don't know where if the backup was place on my internal memory or SD card (I THINK IT DID NOT DO A BACKUP). I went onto my computer to get a custom ROM and tried to install it into my phone using Odin v1.87 when my phone was i guess in "download" mode. (When you hold a few buttons and it prompts you about a warning on installing custom OS).
Just when I saw it fail to install, I realized that I installed the WRONG ROM to my device! (THE CUSTOM ROM WAS FOR A DIFFERENT DEVICE). :crying: When I restarted my phone it was stuck on the Samsung Boot Screen and it would not boot the Android OS and would get stuck on the Boot Screen whenever I would restart my phone. I tried Wiping Cache, Wiping Data/Factory Reset, and Rebooting my device and the same problem would persist. Also the app "Rom Manger" didn't seem to install ClockWorkMod Recovery because I'm only able to do Stock Android System Recovery and "Download" mode to my device.
The thing I think I can do is get a stock ROM for my Samsung Device and reflash it with Odin but whenever I research the ROM for my device I can't seem to find one EVEN on this site. (TRUST ME I DID LONG RESEARCH TO FIND ONE). My brother has the SAME EXACT PHONE and I was hoping if I rooted my bro's phone and do a backup on my bro's ROM with a different app (NOT ROM MANGER) and get the back up on my computer and use it on Odin to reflash MY PHONE'S ROM would it fix my BootLooped/Softed Bricked phone?????OR any ideas on how to get my phone back working OR do I need to buy a new phone if all possible solution fails?
One more thing...I think ClockWorkMod is NOT Safe for my device so if I really need to install it on either phones please tell! :good:
This is how it looks when in download mode (Sorry For The Huge Picture):
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I did the same thing. try sending it into metro pcs they told me they would flash the original on there. they wouldn't do it for me though cuz i cancelled my service with them and got t-mobile with a galaxy s3.