Hi there! I saw this thread when I was working on the
Dreamcast Image Builder and figured this would be a good challenge to test the tool and improve its features, which resulted in a new version that I just released.
With Version 8 and above you can convert Universal Dreamcast Patcher's DCP files to mods, and there are experimental options to auto patch boot LBA and remove common GDROM protections in 1ST_READ.BIN and IP.BIN. I've also added Space Channel 5 Part 2 as a built-in game so you no longer need to create it manually.
Here's version 1.1.1 of the patch and the CDI downsample mod as a package for Dreamcast Image Builder.
How to use:
1. Extract the archive so that the "mods" folder is next to DreamcastImageBuilder.exe, then run DreamcastImageBuilder.exe.
2. Go to the Games tab, select Space Channel 5 Part 2 and set input folder for the original GDI/CUE and output folder for the patched GDI/CDI.
3. Go to the Mods tab and check "English Patch".
4. If you want a burnable CDI, check both "English Patch" and "English Patch Downsample for CDI", as well as the "CDI" checkbox to the left of the "Build" button.
5. Click the "Build" button and wait for the process to finish.
To recreate this package when a newer version of the English patch is released, just replace the files in the mods' "gdroot" folders with newer versions. At the moment my tool doesn't have a diff creator, so you'll need to recreate the xdeltas manually or extract them from the DCP file. The CDI Downsample patch can't use xdeltas, so you'll need to put the patched+downsampled versions of the AFS files in it.
The CDI uploaded at the top of this thread may have changes with unwanted side effects because it replaces all instances of "6E B0" in 1ST_READ.BIN, which I think may break some game data. For this game you only need to replace the one located 8 bytes before the "CD001" string, so I didn't use the 1ST_READ.BIN from this CDI and made the tool auto hack it instead.
I tested this pack on a burned CD-R and was able to get ingame. If your CDI doesn't boot, make sure you have "Region Hack", "Auto LBA Hack" and "Hack Common GDROM Protections" checked in the Options tab. Let me know if you need any help.