XeNTaX

This is the second step.
The first one is to understand what those SPR files are.

I mean, it is obvious they are archives, uncompressed ones, but how can you know where is the end of each file in them?
There is always a header of 0x40 (64) bytes in the SPR files, and there is no seperator between the files (at least not a reapeting one)...

We must understand the file format if we want to be able not just to extract the files, but also to change them.

Let's continue the conversation in the Code Talk forum.

http://gamefileformats.the-underdogs.in ... orer11.zip

This program can unpack *.spr

But entpack can't.

for pak spr !
can help me ?

I tried the explorer and works great, but why use a slzx? if the data are png's, grannny's and ogg vorbis? maybe for a the instructions of every scene and dialogs texts?

Exactly. Most (if not all) of the compressed files are text files.
Pngs etc. are not compressed.