Hey, we all gotta start somewhere.
Personally, I use this- Link It's simple and it works well enough.
EDIT: Ok I am now using the program Latios suggested. I know how to select a part of a picture but how would I get it to exactly 80x165 pixels?
[Edited by Rise_Against, 4/17/2010 11:45:48 AM]
Cropping the image into the exact size or using a resize tool works best. I'm not familiar with paint.net so the tools included with it may be different. If you need more help, feel free to pm me.
What Paradox said.
If you resize it'll shrink the image into whatever dimensions you tell it. With Canvas Size it'll chop off the sides of the image until it reaches the dimensions you want.