Applescript in reverse?

& thanks for all the tips i've had here... this site is ace!

My question is, basically, how to correctly write my script. I've written an applescript, that works great for 1 variable, but i'll need to add hundreds of variables, and that'll currently mean adding hundreds of "if" statements.

So my script queries a FileMaker database & receives an input field (which is variable), i then want to open a the related textEdit file & read the text.

ie... FileMaker Pro returns "123", so i want to open textEdit file "123".

However, my script currently says If text returned is "123" then do this, else if text returned is "234" do this, else if text returned is "345" do this. To write this script with hundreds of "Ifs" doesn't make sense, but i can't get my head around swapping my script to say - returned value is "123" so use file 123.

Does anyone have a suggestion?

Thanks