Nice work so far Mate!
Sorry I couldn't help you with the C# stuff.
It's Greek to me.
C is what I work in mostly, without the Net stuff.
So it hurts my head to try to follow along in a useable way.
I did send a link to a compressed GR2 file so you could see the compressed and non-compressed settings in the Section indexes.
I'll go through some old notes and see if I have some more useable information for you.
I'm sure there's some shoved in a drawer somewhere.
I'm a fantastic note taker, but a terrible note organizer!
I often find notes and wonder WTF they are for!
I've been working on the Fast Finder for a different Game.
So most of my time has been spent there.
Thier problem is that all files are stored in a cache area as numbers.
Kind of like a Manifest number, and no extensions!
There are jpg's, png's, gr2's, xml's, and an unknown type slammed into this cache area!
Fast Finder allows one to drag the whole cache into it and then checks the files known headers to determine what is what.
It then allows a double click to open with a known application, saveing the list so one can open it and work as if just scanned, extremely fast file copying if one decides to copy the files to somewhere else, automatic renameing of the files if a list is provided with the number matched to a known 'Actual in Game Name of file', and more.
It also uses a plug-in system so the main application can be expanded in nearly anyway one wishes.
So you can see why I'm not around much right now.
Regards!!