First you need to download a partition manager and then install it on your computer. You need to choose the ones that support you delete partition with XP. Do you think so?
During XP setup or installation, partitions can be created, deleted and selected for installation.
Start the computer and insert the XP installing CD, and when the process gets the partitions management section, delete the partition in which the W7 is installed, create a new one for the XP, and begin formating the XP.
You need to delete all partitions created by RedHat (you can use DOS native utility fdisk.exe: delete non-native partition or something like that). After start installing Xp during the installation create a primary partitions for the system drive. After that just follow instructions.
boot partition
Windows XP only recognizes FAT16, FAT32, and NTFS partitions. If it is not one of these (such as ext3 or ReiserFS), it will report it as an "unknown partition."
You are supposed to have unallocated disk space if you want to create more partitions. So if you want to split one partition in two you have to delete the partition and then using the unallocated space create two new partitions. There are simpler ways to do that, for instance, using special software such as Partition Magic, Acronis disk editor and so on.
Gypsum partitions are created for interior solutions, not on Windows XP.
It's highly recommended to install XP on NTFS partitions.
You cannot reverse such process especially after you have installed the os. But if you remember the old partition size you can format the disk again, delete partitions which you don't need and create a partition which you want to have.
I any, but the size of partition should be more than 1 gb or something like.
Typically you can only have 4 primary partitions per hard drive if you are using the MBR partition layout scheme. If you need more partitions than the maximum allowed (4), then there is a way to get many more partitions with only one hard drive.By creating an extended partition you can have as many logical partitions as you need within that extended partition, thus you can have more than only four partitions. You can have 3 primary partitions and one extended partition (for a total of 4), and inside the extended partition you can have as many logical partitions as you need.The one thing to keep in mind is that any type of Windows Operating System needs to be installed in a primary partition, otherwise you cannot boot into it. Windows XP in particular, needs to be installed in the first primary partition. For everything else, you can create as many logical partitions as you want inside the extended partition.
You have to create at least one more partition for Vista. If you install Vista on the partition where XP is installed Vista will delete XP. To avoid such problem you have to have one more partition. When you do that just start the Vista installation process from XP and choose just created partition for Vista.