Hi m,

2 options:
1) If the part preceding the number is static (Always "Print Screen:  #" or
"Text Document:   #") you can use styles. Just include the static text as
part of the numbering scheme when you set it up:
   Format;
   Styles and Formatting...;
   Create new style;
   Get tot the Bullets and numbering dialog from the New style dialog;
   Choose "Numbering";
   Click on "Customize";
   At the top, where the number for the style numbering level is displayed,
type the static text just before the number in a grey background;
   Set the Indent, Tab and number position from the Numbering dialog;
   Finish setting up your style (Other paragraph or font attributes...).

or

2)
Use SEQ fields.
For an overview see:
http://word.mvps.org/faqs/numbering/WordsNumberingExplained.htm

What you need here is SEQ fields (which see in Word's Help). Create a
different sequence for each list. Note that SEQ fields do not update
automatically; you have to select them and F9. Alternatively, depending on
how you're using them, what you want may be a Caption (Insert | Caption or
Insert | Reference | Caption). You can create custom labels (such as "Print
Screen: #"), and Word keeps track of the numbering.

--
Suzanne S. Barnhill
Microsoft MVP (Word)