Masked Compression (Ultimate compression in one go)

[Razor12911]

The only thing you must figure out is how the header is structured.

Normally the the precomp header gives the version. It must tell you where the processed streams are located then after finding then, it makes it very easy to make the unpacker.
Another tip, if using handles, never write anything on cmd window that isn't part of the data. Meaning all that Precomp v0.4.4 - UNSTABLE bla bla has to go else you'll end up with errors unnecessarily.