Installing those TGZ with Package Manager?

I gut the QNX on a CD that came with a Computer magazine. There were
also some QPK/QPM Files on it that were easy to install with the Package

There was also a Gimp-Version that should work with QNX as TGZ-File. I
just was able to unpack it, but wenn starting the Install file there was
an error message.

Is there a place where I can get these Software in a Format that will be
easy to install with the Package Manager?

I wonder why all files I found on the QNX Server were in TGZ-Format.