boot your system with your WINdows 98 CD\startup disk
1. fdisk
this message will show: do you wish to enable large disk support(y/n)
2. press y enter
3. press 1 to create dos partition or logical dos drive\ press enter
4. press 1 to create primary dos partition \press enter
maximum available size for primary dos partition press "N" here
enter your c: size (e.g 8000) press ESC to continue
5. press 2 to active partition
6. again press 1 to make extended partition
7. press 2 to create extended partition
8. press enter to used full space
9. press ESC to conitnue
10. enter the d: volume space
11. press ESC to exit fdisk & restart your computer to save partition
12 boot your system with your WINdows 98 CD\startup disk
13. now format your c: threw format
syntex= format c:
14. now ready to install operating system