docs: describe move-based install, new update list rules and logging

README.md

@@ -108,12 +108,13 @@ Use hekate or another bootloader to launch the payload:
 3. Detects which pack variant is on SD card
 4. Determines installation mode (update vs clean)
 5. Performs cleanup based on mode:
-   - **Update**: Selective deletion of specific paths
-   - **Clean**: Full wipe with backup/restore
-6. Copies files from pack directory to SD root
-7. Creates version marker file
-8. Cleans up old version markers
-9. Launches hekate (`sd:/bootloader/update.bin`)
+   - **Update**: Selective deletion of OmniNX-shipped paths (user-installed apps and sysmodules stay)
+   - **Clean**: Selective wipe with backup/restore of user data
+6. Moves files from the pack directory to the SD root (same card, so no copying)
+7. Applies extras (RAM / Hekate-Pro choice) and removes the pack directory
+8. Launches hekate (`sd:/bootloader/update.bin`)
+
+Details: [INSTALLATION_PROCESS.md](INSTALLATION_PROCESS.md). Test runs can write a log via [`debug.ini`](DEBUG_INI.md) (`log=1`).
 
 ## Variant Support