Madlib style Word tool

Hello,

I have been working on sending out my resume to several jobs. I would like to find a tool that allows me to 'tag' certain words in the document so I can customize it.

For example if the letter says something like this;

"Dear Mr. Doe,

I am applying for a position in XYZ Corp....."

I would like a tool where I can set it up such that it asks me "Name of correspondent?" and I would enter "Mr. Doe."

And then "Name of Company?" and I would enter "XYZ Corp." and it will automatically fill out these values in the document (especially in recurring values) and I can have a custom letter.

Also if I were to take this one step further and create a customized email based on some of these values too ie tie this to any email agent or even online email agents like gmail.

Thanks, Del