CheBuzz put together an unsigned .aos file for gen6/IMT devices.
For those who run an hacked firmware this makes installing an multi-boot environment very easy. Just unpack this zip-file, rename firmware_archos5-7_dualboot.aos tofirmware_archos5-7.aos and move it to your device via USB.
Please note that this file only contains free software and there is nothing unlawful happening if a user installs this file.
BOOTNOTE: The file is – obviously – unsigned. That means it will not install if you run stock Archos firmware. Period.