Linux uninstall

well, my first question is that, how do i uninstall linux 9 without teasing my winxp and win2000pro.

and second one is senario:
i had install linux 9 at my win98 and winnt pc, but one day from winnt i delete the partitions of linux 9, now the linux boot loader says reinstall linux and denies me to go further to win98 and winnt… now what should i do…