How do i remove windows vista and install windows xp with out losing all my other stuff

yes you can install vista....................without lossing your data.......
If you are running windows xp then don't install the vista where you have installed xp...........just installed the window vista in other drive
If your system is running in vista only.......then u can install the vista on that drive this will not lose your data

You must use a full retail or OEM version of XP (not the cd from your old computer) this makes life really easy and can usually be downloaded from the web.
You must also have a genuine XP key, which has not been used on another system.
Next you should know or find out the specifications of your system, to do this goto Manufactures website.
The most important step is to find out if your hardisk is using SATA interface (if so you will require the SATA XP drivers and a floppy disk, as this is the only way that XP can install these drivers.)
Install XP via cd rom by booting cdrom at system start (if you cannot do this then you must access your system bios at first boot by pressing F2 or Del keys(or whatever key your system uses) and change the boot option to cdrom as first drive.

If your system uses SATA press F6 when XP prompts “press F6 to install other” at very beginng of XP install and install sata drivers from floppy.

Is it ok if your files get lost forever?  If it is then what you have to do is when it says if you want to partition a hard drive space, you delete the biggest parition (which wipes any and all vista and files of the computer.)  Then it will ask you which partition you want use.  Use the one you just deleted, whhich is the biggest one.  It will ask you to format it and stuff, just go with it.  Then you will have XP instead of Vista!  (Warning: I warned you above that this way will wipe of vista and any other files-documents-photos-everything off your comptuer)

If the backup and recovery disk are for that model of computer , just remove VISTA or Reformat the hard driver using software outside of Window, then reinstall all the Xp stuff, just as if you had a new hard drive. Save all personal files first, of course.. 

You need to get rid of the Vista Demo, and reload xp. You need to keep one or the other I think, you can't keep both operating systems on the same drive. What were you thinking?
Did you install the vista demo as a dual boot setup? Doesn't sound like it.
I hope someone can help you, I can't.

Go to the Brother web site and download software and drivers for windows XP, delete the vista one, and install windows xp stuff. Windows does't read much of the vista software.

First, have you deleted Vista, or are you trying a dual boot?

Second, you do not have to disable your HDD or you cannot do the installation!

For a step by step procedure to install XP on a Vista computer (dual boot), please check here:
http://www.syschat.com/dual-boot-vista-xp-vista-already-1946.html
or
http://apcmag.com/how_to_dual_boot_vista_and_xp_with_vista_installed_first__the_stepbystep_guide.htm

I do not recommend removing Vista completely,if that is what your laptop/PC came with, as most components and drivers installed will be Vista specific. If you need to have XP, make sure you have all the drivers for XP first.

First you want to install xp and then only you want install vista because higher version will not take lower version.

If you have installed vista as a multiboot sytem, then you can do the below: Otherwise you have to do as tom19511 said:

Uninstall Windows Vista on a multiboot system
Applies to all editions of Windows Vista.

You cannot uninstall Windows Vista. However, you can change the code that starts the operating system (often called the master boot code), and then remove Windows Vista from your multiboot system and return to Windows XP or Windows 2000. You will need your Windows Vista installation disc for this procedure.

Before you begin, back up your programs, files, and settings. Removing Windows Vista is an advanced procedure that could result in losing information stored on your computer. For information about backing up data, search Help and Support for "back up."

1) Insert the Windows Vista installation disc.
2) Click the Start button , click All Programs, click Accessories, right-click Command Prompt, and then click Run as administrator. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
3) Type [DVD drive letter]:\boot\bootsect.exe /nt52 ALL /force and then press ENTER.
For example, if the DVD drive letter is F, type f:\boot\ bootsect.exe /nt52 ALL /force.
4) Eject the Windows Vista installation disc.
5) Restart your computer.
Your computer will start in the previous version of Windows that you have installed.
6) Delete Windows Vista files and folders, such as the Program Files, Users, and Windows folders, manually.

Note: You can also remove Windows Vista by reformatting the partition where it is installed, but do this only if that partition is not the boot partition. Reformatting the boot partition might make your computer unable to start.

Vista has issues re drivers for older stuff The best you can do is seek out an older machine[a friends] and get the stuff off onto CD.