after installing kubuntu 8.10 other bootablea

hi , i have done a dual boot many times but recently tried to get acquainted with linux live cd uses .hence i tried with kubuntu 8.10 .the experience was good but when i installed it on the disk the other bootable discs of any OS were not detected when i tried XP disc it just flashed "press any key to boot from CD.." and then "set up inspecting hardware configuration " and then the setup hangs in there I also tried an Ubuntu 9.04 DVD but it was not even detected though i have DVD rom on my system other DVD's of movies or others were detected in kubuntu but this was'nt i checked the disc on other computer the disc was working Now i wanted to install XP on my machine but it is not even going beyond the hardware checkup plz any help would be appreciable

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