Using Word to pre-populate data items.

Hey guys,

I'm working on a project where by I have a document which is produced for customers which has a set amount of data items, which are only shown if certain contitions are met, example;

If x = 1 output: A
If x = 2 output: B
If y = 1 output: C
If y = 2 output: D

etc...

It's a printed document and the output depends on the conditions above being met, so they could receive a document with text; A, C, D and H on it. However, what I want to do it create a 'propotype' to easilly show these conditions on the page if they're met - difficult to explain so I'll try an example here.

In Word I have a catalogue of data items:

<BR01> = text here
<BR02> = text here
<BR03> = text here

But what I need to show easilly is where each of these <BR> contain a text sentence, but I only want to output 1 and 3 how can I do this easily, to prototype this letter in it's various forms, or is there another way I can do this?

Hard to explain...
Thanks.