wait, directly removing the linux partition without removing the boot loader will cause more problems.
since u have windows 98 installed, let me tell u a very easy way. boot into windows 98, open the start menu>Run. type in command and press enter.
in the command prompt, enter this:
this will erase the linux boot loader.
now restart the pc (u wont find the option to boot into suse) and boot into windows xp. go to control panel>administrative tools>computer management. here, click on disk management in the storage menu. here, the linux partition will be shown as Healthy (Unknown Partition). right click on the partition and click on delete logical drive. then format the drive as ntfs or fat32.
hope this helps.