Oh, I can help! Here is something I posted last year, and I still use it frequently:
Go to http://www.avery.com Go under Software (in the purple box at the top of the page) then "Blank Label Templates"--this is great for setting up blank templates for invites, postcards, etc. Type 8387 in the box for Search by Product Number, and it will bring up templates for a 4 1/4 x 5 1/2 postcard in landscape or portrait. Download the template into Word, and you're off! If stuff isn't lining up just right, be sure to check the cell alignment (right click on the cell, then you can check/change it). There are also many other templates that could be used for toppers, name tags, table tents, place markers, books, sentiments for cards (using a really cute font), circle stickers (that fit onto round metal edged tags), and tons of other things! The possibilities are endless! And you don't even need the stickers--print your stuff out on cardstock, cut, and ta-dah!! HTH!
ps: you can even use this to print on the inside of your card--just print in the right half of the page...top or bottom (in portrait mode), and this will be the inside of the card!
***Since posting this the first time, you now have to download things a little differently, but it will be easy-peasy! ***
HTH!
