In both computer labs (CVA 138 and CVA 50) there are UMAX VistaScan Scanners using the USB port of the computer.  The scanning interface is a bit different than the parallel port interface.  Follow the instructions below to get things running.

1.  Make sure the scanner lamp is turned on.  Go to Start Menu => VistaScan => Power Saving Features.  This will force a pop-up button to appear that allows you to turn on/off the lamp inside the scanner.  (Very Important!)
 
 

As you place the mouse cursor over the scanner area, it will turn green.  Directly below the scanner icon is where you turn the lamp on/off.  Click on either on or off to turn the lamp on or off.  Simple!

2.  Make sure Photoshop knows which device to use.  Launch Photoshop go to File => Import =>  Select Twain (32) Source
 

The next window will allow you to select from the available Twain sources (if more than one is available).  Select the VistaScan32 V3.1

3.  Place your image in the scanner and proceed with the scan.  Go to File => Import => Twain_32.  VistaScan's software will launch and your screen should look like one of the two images below.  NOTE:  There are two modes of operation, Beginner Mode and Advanced Mode.  You will want to use the Advanced mode as it allows for more control over the finished scan product.  (Click on the Beginner/Advanced bars to toggle the mode.)

    Beginner Mode (highlighted in Yellow)

Photoshop will automatically make a preview of what it finds on the glass.  Use the buttons on the right to select what type of media you are scanning.  When you do this, the software will begin to scan and will eventually open the file in another window.  Use the "Marquee" tool to select what portion of the media you are scanning.  When done, click EXIT.  However, I would strongly reccommend using the Advanced Mode which is explained below.

    Advanced Mode  (highlighted in Aqua)

Using the Advanced mode you can select from many different options of scanning in your photo.  For the best results, use the options as shown above.  It will probably work for most color photo situations.  If you are scanning in material from a magazine or anything that results in a Moire pattern, check out the Filter options.  There are several preset filter options that will also most likely work in all situations.  Furthermore, you will have to use 75 dpi as there is no option for 72 dpi.  When the scan is done, click on the Exit button and your scan will appear in a new window.