Tracker_TD explains more of what this disc is meant to do here:
All props goes to Tracker_TD for resurrecting this disc and making it workable with GDEMU.Oratorio Tangram's Dreamcast port was based on version 5.4 of the game. The arcade version later saw update 5.66, which never made it to Dreamcast... outside of a very obscure demo disc, given away with Dreamcast Magazine in Japan. The purpose of this disc was actually to allow customisation of the new Virtuaroids introduced in 5.66, since obviously it couldn't be done with the existing Dreamcast port. That said, it's very limited - it's literally just a colour edit tool, nothing more. After this, a Virtual On fan named Scott Robinson created a boot disc named 'Cust-Plus', that can do two things. If you boot the Dorimaga 5.66 Disc with it, it'll enable the locked off 'VR Test' mode, that allows you to try out your new colours in battle. This is notable because it means you can actually play as the 5.66 mechs on Dreamcast, albeit in a very limited training mode, and apparently with some differences to the actual arcade version. The more useful thing to do with Cust-Plus is using it as a boot disc for Oratorio Tangram's Dreamcast port (5.4). As well as unlocking the debug damage value display in Training Mode, this unlocks the ability to use saved custom Virtuaroid colours in-game, by pressing Y on the Virtuaroid Select screen.
Check out Tracker_TD disc from the download link on his site here: https://astromuseum.org/games/VOOTCustom/VOOTCustomDisc
CDR users can download from that link and use it as a boot disc for their Japanese copy of Virtual ON. Also GDEMU/ODE users can download from there to use. But...
I have taken the liberty of repacking Tracker_TD release to better suit gdemu users. I have altered nothing else on his disc. My repack simply has added a new ip.bin with unique product number for catalog in openmenu that will display name correctly on old menu. And I added this picture as pvr image for old gdmenu. download
https://mega.nz/file/Z6gFVRLb#2Dby0xNlV ... r-Zx5RC8Wc