[lubuntu] Need help partitioning

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http://ubuntuforums.org – So my laptop's hard drive failed two days ago and I bought a new one. Since I no longer have to worry about keeping the partitions that Asus put on it and the copy of the Windows 7 OS in its backup partition I decided to learn how to partition a hard drive and install Ubuntu side-by-side with Windows 7. So I made three partitions on a 500GB hard drive. One of them is 150GB, another one is 20GB and the last one for data is all of the remaining space. I formatted the 20GBs one with Ext 3 to ready it for Lubuntu ( I chose 20GB because I'm only going to use it for simple image editing and a lamp s (Hardware)