Trying to install ubuntu after Windows 7

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http://askubuntu.com – New to Ububtu and here with a question. I already have Windows 7 installed and have already partitioned the hard drive into multiple partions (formatted by NTFS). Now besides windows I wish to install ubuntu in one of those partitions. How may I do so? Can I directly install Ubuntu on one of the drives? I tried using some tutorials online but most of them are talking about OEM PCs (or so it appears to me). I also checked out the tutorial at Life Hacker (http://lifehacker.com/5403100/dual+boot-windows-7-and-ubuntu-in-perfect-...), but being a novice all that sounded hebrew to me. Thanks (HowTos)