Slight error here. The commands are fixboot and fixmbr, not fix mbr and fix boot. Apart from that, everything else will work nicely.

Another thing worth noting is that you don't actually need any partition managing software if you don't want to resize your boot partition. All the tools needed are supplied with windows. With XP and 2000, you can just go to control panel, administrative tools, disk management to delete the Linux partitions. With Win9x, the only tool you need is a bootable floppy disk with fdisk on it. Boot from the disk, and type fdisk/mbr to remove the bootloader, then just use fdisk to remove the linux partitions and create a new DOS partition.