First of all, I'm basically new to modding sims files, I was able to do so in Sims 1, but never tried Sims 2, and see that MUCH has changed.

But what I wanted to see, was how EA puts non-repeating logo patterns on shirts and whatnot, so I downloaded the Lord Sponge Tee and decided to play around with it.

First I tried to extracted the .Sims3Pack file with the Lepid Llama unpacker, and nothing happened. So I used s3pack, and that worked. I got my .XML file, the preview .PNG, and the .PACKAGE file.

So I tried to view the package file in Postal, again nothing happened. So, then I tried to view it in S3PIDemoFE and got an error:

Expected magic tag 'DBPF'. Found 'DBPP'.

And I was wondering what the difference is, and is there a way to extract DBPP package files?

Again, I'm new to this, and don't really know what DBPF or DBPP is, I'm trying to learn, but it's proving difficult.

DBPF is Database Packed Format. It's the normal .package files.

DBPP is Database Protected Format. It's protected content from the store that normal viewes will not open.

There is an article on the wiki about DBPF: DBPF^wiki

OIC, they're basically copy-protected, makes sense, thanks...