how to reuse ntfs partition?

[nepal.roade at googlemail.com]

Am running Kubuntu 8.10 with all updates.
I have a 70gb ntfs partition that is the first partition of my hard drive and  
I want to use it for Linux. 
I have several existing Linux partitions. All the partitions including some 
I've added manually are mounted using the UUID and not the /dev/[device name] 
method. (see fstab below)

I am guessing that the ntfs partition is sda1 (not listed below).
Can I delete this ntfs partition and reuse the space as an ext 2 or 3 
partition and put another linux on it **without upsetting the existing drive 
configuration? 

It looks like this is going to mess up the grub configuration if I change the 
drive /dev/ references. Do I make the changes and then run update-grub?

here is fstab;
===============================================
# /etc/fstab: static file system information.
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# /dev/sda2
UUID=6d7ae70f-db6f-41c1-8a29-7b478c7eae2c /               ext3    
relatime,errors=remount-ro 0       1
# /dev/sda5
UUID=1b0b10ef-a3c8-473b-88e5-289a7ef7aa1d /home           ext3    relatime        
0       2
# /dev/sda6
UUID=24c79330-bf9a-48d1-a5fd-94753e6d8ed0 none            swap    sw              
0       0
# /dev/sda7
UUID=4bb11f5b-2e47-4be8-b028-687e7cfcba96 /mnt/music      ext2    
relatime,users        0       2
# /dev/sda8
UUID=415be995-b383-4002-b703-f9f1892a5ce1 /mnt/vb_Disk_2  ext2    
relatime,users        0       2
# /dev/sda9
UUID=280686a1-f9f5-4296-bb25-8ff64402d662 /mnt/sabayon    ext2    
relatime,users        0       2
===============================================

nepal.