In theory, your computer should upgrade from Windows 98 to Windows XP without any hitches. That is assuming that your hardware is XP compatiable...
If you want an excellent article on the background of Windows 98 -> XP, including a step-by-step guide with screenshots and post-installation tasks, visit this link.
If you want an excellent article on the background of Windows 98 -> XP, including a step-by-step guide with screenshots and post-installation tasks, visit this link.