As the size of hardrives increase, more people are using partitions to seperate and store groups of files.
XP uses the C:\Program Files directory as the default base directory into which new programs are installed. However, you can change the default installation drive and/ or directory by using a Registry hack.
Firstly, you’re going to want to make a backup of your registry before making any changes. You can back it up by opening the registry editor and choosing File and then Export.
Run the Registry Editor (regedit)and go to
By default,this value will be C:\Program Files. Edit the value to any valid drive or folder and XP will use that new location as the default installation directory for new programs.
Now look for a key in the right panel called ProgramFilesDir. You should see that the value is C:\Program Files.
Now you can change the path where ever you like to install the programs by default.