UEFI dual-boot, how to load recovery partition (Windows 8) after installing Ubuntu

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http://askubuntu.com – I've installed Ubuntu (~EFI mode) in a ASUS Zenbook UX32VD, which has Windows 8 pre-installed. It had Security Boot disabled. I installed grub in the same partition I put the root directory (sda7 in my case). After installation Ubuntu loaded and worked, great. But there were 2 other partitions in grub that didn't run: Windows Recovery Enviroment (loaer) (on /dev/sda2) Windows 8 (loader) (on /dev/sda4) Whenever I try to load any of the above i got: error: can't find command <<drivemap>>. error: invalid EFI file path. I found in Internet multiple people having similar issues: (HowTos)