HELP! Additional Hard Drive not seen on desktop

Hi, i have a G4 MDD powermac with full-ish 80gb hard drive and have installed a segate 160gb which i was told was ok.
the problem is that it is there but not on the desktop. I followed the instructions in my manual and thought that would be all i had to do!

the original hard drive from system profiler;
Capacity: 74.53 GB
Model: ST380011A
Revision: 3.06
Serial Number: 3JV5W82C
Removable Media: No
Detachable Drive: No
BSD Name: disk1
Protocol: ATA
Unit Number: 0
Socket Type: Internal
OS9 Drivers: Yes
S.M.A.R.T. status: Verified
Volumes:
Ed's:
Capacity: 74.53 GB
Available: 1.85 GB
Writable: Yes
File System: Journaled HFS+
BSD Name: disk1s9
Mount Point: /

additional hard drive form system profiler;
Capacity: 149.05 GB
Model: ST3160815A
Revision: 3.AAC
Serial Number: 6RA0JY43
Removable Media: No
Detachable Drive: No
BSD Name: disk0
Protocol: ATA
Unit Number: 1
Socket Type: Internal
OS9 Drivers: No
S.M.A.R.T. status: Not Supported

there are differences but i am a technophobe and know nothing !!!!

please help
thanks in advance

Have you used the new drive before? If not, go to apps> utilities>disk utility and erase the HD. Once it's done, it should mount to the desktop. If it's full of goods, you will have to move everything to the original HD or make DVD's.

many thanks
bryphotoguy all done in a few clicks, you are a star
kind regards from over the pond
Jon