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Is it possible to add a third monitor to a notebook with docking station and if so, how?

I have a Dell Latitude notebook that is docked in a port replicator. On the back of the replicator there are two video connections: one digital (white connector) and one analog (blue connector). Currently, I have a wide-screen monitor plugged into the digital connector. The wide-screen monitor is my primary display, and my desktop is extended to the notebook's lcd. I'm running Windows XP Pro SP3.

I have another older flat panel monitor that has analog capability. Is it possible to either:
1) Use that monitor as my secondary instead of the notebook's lcd?
2) Use all three monitors?

If 1 or 2 is possible, please suggest how I would set it up.
Displays / MonitorsLaptops NotebooksWindows XP

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Thank you!
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I finally got around to trying this and it did not work. Here's the setup:

Notebook docked in port replicator. Replicator has a VGA and a Digital port.
Analog monitor plugged into VGA port. I'll call this "VGA".
Wide screen monitor plugged into Digital port; I'll call this "DIG".
I'll call the notebook "LCD".

Control Panel > Display > Settings still shows only 2 monitors (even after reboot).

I use Fn-F8 to toggle CRT/LCD. Starting with the desktop showing ONLY on LCD:

Fn-F8 -->  LCD & VGA; both identified as "1"
Fn-F8 -->  VGA only; identified as "1"
Fn-F8 --> DIG & LCD; both identified as "1"
Fn-F8 -->  DIG only; identified as "1"
Fn-F8 -->   VGA & DIG; both identified as "1"
Fn-F8 -->  back to LCD only

Note that whenever the image gets to DIG, it's using the VGA resolution.

Now tried: with desktop showing only on DIG:
     click on "2" and check "extend ..."
       desktop was extended; DIG is "1" and LCD is "2"

Fn-F8 --> DIG only; identified as "1"
Fn-F8 --> DIG & VGA, both identified as "1"
Fn-F8 --> DIG only;
Fn-F8 --> VGA & LCD; both identified as "1"
Fn-F8 --> VGA only
Fn-F8 --> back to DIG & LCD; DIG is "1" and LCD is "2"

Does this indicate that the port replicator is incapable of recognizing two distinct external monitors? Or is there something I need to set in Windows (XP Pro SP2)?      
Windows XP
Windows XP

Microsoft Windows XP is the sixth release of the NT series of operating systems, and was the first to be marketed in a variety of editions: XP Home and XP Professional, designed for business and power users. The advanced features in XP Professional are generally disabled in Home Edition, but are there and can be activated. There were two 64-bit editions, an embedded edition and a tablet edition.

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