Now with a new clean operating system, hopefully my harddisk can last for another 6 months. Now my old Toshiba Satellite 2800 is equiped with Windows XP(SP1), Office 2003(Final) and all my data are fortunately being recovered. There's no obvious or clear improvement in speed though, maybe Office 2003 or my ICQ 2003b have been taking up sufficient amount of RAM. Not sure lah, but glad that all the data are being recovered

Thanks to yishu81 who helped me with the installation process, my computer looks brand new now.