If you intend to not use boot disks all the time then it is. Most BIOSes can't boot on a partition beyond the 1023rd cylender. What most people do is just make a small (~50 meg) /boot partition at the ...
Using Partition Magic 8.0 I deleted 2 Linux partitions I had on my primary hard disk, they were ext3 and Swap. I then created NTFS partitions in their spaces and merged them with my Windows partition.