Saved your ad to photobucket or some other image saving site. I use imagecoast for mine. You can save it and resize it on imagecoast to the size you need. An 8.5 x 11 advertisement I saved at 400 x 520 and it was fine for me.
Once you do that, get the url of the ad, the location of it
and post it into the following script:
<img src="replace between these quotes the url of the ad you made">
Copy and paste this right in where you type to make your ad.
Be sure to also type in below the ad you place additional text including your keywords and services so that the ad is searchable. Pictures are not searchable so you need the text as well.