I used that u disk installed a lot of times can not, are said to be unable to find the file. Finally find a blog to see how to install a dual system, and finally found that the original can be installed with hard disk. After 5 hours, finally finished. ^-^.
1. First, partitioning can be done using WINDOW7 's own Disk Management program. PS I was installed with the CentOS disc partition, because I was first installed with U disk, but failed, on the partition success. WINDOW7 Partition tool: Right-click "Computer"--> "management" I use more than 200 g. This is my point. The first is all formatting. Then use 40G out of it to format into FAT32 format (note that it cannot be NTFS.) Microsoft's you know. At this time, G disk is able to use under Linux can also be used under the Window7.
If you are afraid that the disk is not available because of an error in the partition, you can back up and use a diskgenius_4.3.0.1 software before that. You can also use this software for partitioning.