Partitioning question

I've been running Suse 10.3 for a while now and love it!!! BUT I've been wanting to try other Linux distros out on the same machine while keeping my current Suse 10.3 untouched. I have enough space on my 320 Gig HD to do that, but how? without having to format the whole thing :newbie:???

Thank you in advance !!!

Here's my fdisk -l info (I've tried to run Gparted, but it just shows me my 2 SCSI Drives 160 Gigs each with unallocated drive space):

# fdisk -l:

Disk /dev/sda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x69205244

Device Boot Start End Blocks Id System
/dev/sda1 1 2201 17679501 83 Linux
/dev/sda2 2202 6118 31463302+ 83 Linux
/dev/sda3 6119 6380 2104515 82 Linux swap / Solaris
/dev/sda4 6381 38914 261329355 83 Linux

Disk /dev/sdb: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00000000

Disk /dev/sdb doesn't contain a valid partition table

Disk /dev/dm-0: 320.0 GB, 320083722240 bytes
255 heads, 63 sectors/track, 38914 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x69205244

Device Boot Start End Blocks Id System
/dev/dm-0p1 1 2201 17679501 83 Linux
/dev/dm-0p2 2202 6118 31463302+ 83 Linux
/dev/dm-0p3 6119 6380 2104515 82 Linux swap / Solaris
/dev/dm-0p4 6381 38914 261329355 83 Linux

Disk /dev/dm-1: 18.1 GB, 18103809024 bytes
255 heads, 63 sectors/track, 2200 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00000000

Disk /dev/dm-1 doesn't contain a valid partition table

Disk /dev/dm-2: 32.2 GB, 32218421760 bytes
255 heads, 63 sectors/track, 3917 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00000000

Disk /dev/dm-2 doesn't contain a valid partition table

Disk /dev/dm-3: 2155 MB, 2155023360 bytes
255 heads, 63 sectors/track, 262 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00000000

Disk /dev/dm-3 doesn't contain a valid partition table

Disk /dev/dm-4: 267.6 GB, 267601259520 bytes
255 heads, 63 sectors/track, 32534 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x00000000

Disk /dev/dm-4 doesn't contain a valid partition table