Extra drive appearing for no reason?

[yak]

I just noticed today that I have an extra DVD drive on my pc.
Normally when I open My Computer folder, I get;

c drive
d drive default dvd drive
e drive default cd-rw drive
f drive removable zip drive

However, when I opened up My computer folder today, I also get;

dvd drive (G)

Opening up Properties on this,

AXV CD/DVD-ROM SCSI CdRom Device
device type; DVD/CD-ROM drives
location; Bus Number 0, Target ID 0, LUN 0

Status; This device is working properly.

Does anyone have any idea what's going on?
I have a suspicion that it's something to do with a program I installed today. It's Alcohol 120% and I didn't want to install it in C drive so I did it in F drive (saved in a 100mb zip drive disk).
I don't like to see this additional drive on my pc when I never had another dvd drive to begin with. Any suggestion? Thanks in advance.

My pc spec

Windows XP Home Edition
Dell Computer Corporation System Model: DIM4500
BIOS: BIOS Date: 05/22/02 16:06:01 Ver: 08.00.00
Processor: Intel(R) Pentium(R) 4 CPU 2.00GHz
Memory: 254MB RAM
Page File: 177MB used, 446MB available
DirectX Version: DirectX 9

[RJ]

That'd be a virtual CD/DVD drive. According to Alcohol 120% website you can have up to 31 of them. I never used Alcohol but with CloneCD I was able to select during installation if I want to have the emulator or not.

RJ