hi,
Boot into Linux using a rescue diskette or CD and then type the following command:
If you have only one HDD as master it is /dev/hda, if you have 2 HDD, one as master and one as slave, the master is /dev/hda and slave /dev/hdb. In your case Ithink that you have one HDD, so you can type:
$ fdisk /dev/hda
Press "p" to print the partition table and then you will see how many partitions you have and then press D for delete and it will prompt you which partition to delete. Assume that you have one partition then press D and then 1 i.e /dev/hda1. Press "n" to create new partition. You can create primary and logical partition and do not forget to press "t" for each partition, if u 1 2 create Win98 FAT32 as I remember is pressing "b". After you create partition all everything you need is that you have to press "w" for writing the partition that you have done and then "q" for quit. After that goto /sbin/lilo -u (for uninstall Linux, if you don't c it /sbin/lilo restart ur machine insert MSDOS disk that have FDISK and type FDISK /mbr. I think it will help you.
Choth