Recovering beta Portal 2 content with VRF

[Devteam5]

VRF is a Source 2 asset viewer that features the ability to recover some deleted assets. From what I read, the program works on nearly all Source 2 games, and Portal 2 for some reason (it's one of the only Source 1 games the program works with).
The Cutting Room Floor says the program can un-delete files in Portal 2 just like it can for Source 2 games, but when I tried it, all i got were hex files. TCRF shows two of the files as viewable files.
I was wondering if anyone here can help me figure out how they got the files in viewable states. I asked them, but never got a reply.

[MegaMan1904]

sounds interesting
try it on the day 1 build of portal2 you might find something interesting (or not idk)

[Devteam5]

So here's what I discovered so far:

Base Game: 148 files recovered
- Some are text documents that can be opened, but they're pretty dull. Most mention fonts . A few mention GUI things. A few mentions Coop bot taunts.

DLC 1 (Peer Review): 10 files recovered
- None viewable

DLC 2 (PeTI): 32 files recovered
- None viewable

I still have no idea how to view these normally, or how to convert them, or how any of this works. Would appreciate it if someone knew what to do.

[MegaMan1904]

Try the earlier builds things if that possible

[Devteam5]

Try the earlier builds things if that possible

I can't find any early builds of Portal 2 (only one I can find is the previous build branch on Steam, and that does nothing). I've searched online everywhere, and the closest I got was an archived XBox 360 build.

[Sarah]

this was done before, nothing very useful. im pretty sure the only thing that was found was a temp chapter icon