i`ve used the dual boot betwen ubuntu and winxp for 6 months. the boot u should use is gnu root loader "something like that" which u can find in ubuntu cd. after u install the ubuntu while u also already have the winxp installed. the ubuntu setup `ll ask if u want to install the "gnu root loader" or not. from what i`ve learn. using the ubuntu root loader can make user to choice which os they want to load while booting. but if they don`t make any choose, the "gnu root loader" will automatically load the ubuntu. There alot that i have to learn. i`m sorry coz my english is very very bad if i`m wrong in explaining, i`m sorry too