Forceful umount or parted help?

[Zlatko Savic]

Hey everyone, I used the 'rescue' option from the Mandrake Install (8.1) CD 
and after it was loaded and all partitions were mounted, I tried to unmount 
my /dev/hda5, which is my root during normal usage. However, the response 
was that the 'device or resource is busy'. I tried
umount -f /dev/hda5 but without any success.
I am trying to unmount all linux partitions on my hd so that I can move 
them from one place (sector) to another (sector) using 'parted' which is 
included in the rescue mode. I tried using parted to move my /dev/hda5 (my 
root dir) but it gave a message about the device not being unmounted and 
that I should run e2fsck. I ran it, it all seems fine but all I want is to 
unmount the partition while i'm in the rescue mode from the install cd. 
That should not be really a problem since the temporarily created system 
works from /dev/ram3, which is a little piece of my  memory, with all the 
tools available.
Any ideas how to go about this?

Thanks to all helpers out there!
Zlatko Savic