Looking for a theme maker download for you Nokia N73? Or any Nokia cell phone for that matter?
The easiest not paying money for it version is probably available through Zedge, who just recently started offering a new theme maker feature for your cell phone.
First you pick your cell phone model, so it's correctly formatted. Next you upload the image you want; I picked a picture of myself for lack of a better idea. And then you can play with background colors, as well as being able to set up default ringtones.
When you finish, you can download your Nokia N73 off of theme maker, directly onto your PC. Once on your computer, you can get it on your cell phone, using Bluetooth, infrared, or USB.
You can try the Nokia N73 theme maker download for yourself here at Zedge.