Updating OLD homebrew to new version

Sorry if this is a duplicate post.

10+ years ago, one of my college professors homebrewed my PSP. At the time, I knew very little about it, and him being from China, everything that he did to it was in Chinese, so I really have no idea.

I recently found it, 10 years later, and was able to pull up the old games that were installed on it. However I didn’t really care to play them so I downloaded GoD of War and placed it on the memory stick, I place of the other games. However, GoW does not show up on the PSP, which I assume is some type of firmware upgrade needed.

What I know:
PSP1001
System software: 5.00 M33-6

I would like whatever is the newest CFW but not sure how to get there, and not sure how to tell what has been done to it as of now.

Thanks!

 

Thanks for the response, Pedro.

Do you have a link to the PRO Updater? I am not exactly sure what that is.

 

Alexander,
I don't have anything similar in the PSP\Game directory. The only files that are there are...

._.txt
._UPDATE
.DS_Store

I also recently added an UPDATE directory with with 6.61 update within it.

From a guide I found, it seems like I have m33, and I could just do a straight update without needing to remove the old CFW. Thoughts?
...
Official Firmware below 6.60 or using CFW M33/Dark AleXEdit

Method 1: Connect to Wi-Fi. From the XMB (main psp menu), run System -> Network Update to install OFW 6.60.

Method 2: Download OFW 6.60 from Sony's site, and extract the file. (There are two different versions for PSP and PSP Go!)
Copy EBOOT.PBP to PSP/GAME/UPDATE/

 

Oh sorry, I completely missed your second response, Pedro, which included the files.

Thanks, am working on it now.

 

Ran PROUPDATE and got

"Sorry. This program doesn't support your firmware"

 

Ok I was able to get 6.61 OFW installed. The link provided above was for 6.60 CFW. Is that what I am looking for, or is there a 6.61?

Link to 6.61 CFW if so?