Preinstalled Win8 UEFI does not able to get Ubuntu dual-boot

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http://askubuntu.com – all. I just brought a new Toshiba Satallite M840 with pre-loaded Windows 8. I checked the Windows is installed in UEFI mode. I did a lot of researches online on HOW TO get Ubuntu 12.10 install for dual boot. First, i setup to BIOS as quick boot to normal normal and disabled the secure boot. I installed EaseUS Partition Master 9.2.1 and created a 64GB partition (NTFS), i called this partition - F drive. I also downloaded Ubuntu 12.10 64-bit DVD.iso. In Windows 8 desktop mode, i launched Ubuntu Studio 12.10 and installed Ubuntu on this F drive. The installation went all the way without prob (HowTos)