I recently bought a Gen8 and XPEnolog'ied it! Very simple if you don't want to virtualise anything. Here are the relevant steps:
1. Write the bootloader image to a USB drive (XPEnoboot 5.2-5565.2 from here: http://download.xpenology.fr/). Plug it into the back of the Gen8 and leave it there permanently.
2. Connect a keyboard and monitor to the Gen8. Start it up and watch the boot - select 'install/upgrade' when you get to the appropriate boot menu.
Everything after here can then be done remotely... ie from another PC. You can remove the monitor and keyboard from the Gen 8 at next reboot .
3. Open a browser and type : http://find.synology.com
4. Step through the Synology install wizard, using the manual DSM install option (providing the full DSM 5.2-5565 pat file from here: http://www.xpenology.nl/xpenology-software/ )
5. Reboot the Gen8 as required, Log in again remotely and head into the settings and turn off auto updates (I leave it at the 'notify only' setting)
6. You can either then manually provide the DSM 5.2-5565 Update 1 pat file, or let the Synology download it via the OS.
Done.
Total time to do this, 30 minutes tops.
HTH