I am trying to install Ubuntu 10.04 Desktop Edition with my 2GB flash drive. I have 2 partitions on my 200GB S-ATA hard drive. One is System 50GB(NTFS), other is Media 150GB(NTFS). I want to install Ubuntu on "System" 50GB partition, but i get this error: No root file system is defined. Please correct this from the partitioning menu. I need some help, i dont know what to do. Thanks.