Redream Per-Game VMUs for LaunchBox

Created by Saieno - @Lets_All_Game on Twitch and YouTube

What it is

A ready-to-use installer package for enabling per-game Virtual Memory Unit (VMU) save file management in Redream; fully integrated with LaunchBox

Why use it

Redream creates four VMU files, and by default all four are shared across all games. This tool creates a vmu0.bin dynamically per-game, while leaving vmu1–vmu3 shared and persistent.

This allows each game to have its own memory card (vmu0.bin), preventing cross-game save data conflicts and minimizing space limitations.

Requirements:

• LaunchBox 13.12+ (must be closed during installation)
• Standalone Redream (latest version)
• Redream configured with automated default settings in Launchbox
• More than one Emulator configured within Launchbox
• ROM filenames with single spaces only
• Windows 10/11 (not available on Android)

What it does

• Installs a dynamic launcher (DCBoot.bat) and a minimized shortcut (DCBoot.lnk)
• Installs a custom AHK script (LaunchGameRedream.ahk) for handling VMUs
• Copies a blank vmu-default.bin into Redream
• Modifies Redream Emulator in LaunchBox to hook into the new launcher
• Installs a custom LaunchBox plugin (PerGameVMUName.dll) for consistent and clean VMU naming

Bonus

• Full uninstaller included — reverts all changes and cleans up
• Everything self-contained, no manual file editing required
• Installer remembers paths via settings.conf for faster reinstalls/uninstalls
• VMU files are based on the name within LaunchBox for consistency
• Share and trade per-game VMUs easily from the Redream VMU_Games directory

Before You Install

If you already have save data in vmu0.bin, consider moving those saves to vmu1, vmu2, or vmu3 before installing. After installation, Redream will use a new game-specific VMU as vmu0.bin for each game. Once a game is launched, you can transfer your old saves from the shared VMUs (vmu1–3) onto the new per-game VMU within Redream itself.

Known Issues

• Filenames with double spaces will not load properly into Redream. Please use a tool like Bulk Rename Utility to clean up ROM filenames before launching.
• If Redream is the only Emulator configured within LaunchBox, it can cause issues on install.