The following procedure flashes the stock Roger's boot image with root access enabled to your Roger's Magic :
1. Copy this update to your SD-card.
2. Download RAv1.0's rooted recovery here.
3. Boot the device in fastboot mode.
4. Connect the device to your machine over USB.
5. $fastboot boot recovery-RAv1.0H.img
wait a few minutes and unplug your device from USB
6. Choose option "Apply sdcard:update.zip" from the menu
If the flashing doesn't work you might need to flash this SPL update from your sd-card after fast booting with recovery-RAv1.0H.img
If you want to have a rooted recovery as well, you can check out this post.
Special thanks to :
Haykuro for all his help ^^ , buy him a Nesquik!
JesusFreke for his JFv1.43's recovery