Resizing avi with gspot or agk

I am still not getting this right.Can anyone explain what to do or provide a link.I know it can be done but not sure quite how.

Not exactly sure what you mean by “resizing”. Please give a little more detail as to what you want to do, what your source is, and what you want as a final product.

I have an avi which is 960 pixels wide and i need to make it 720 0r less.My dvd player wont play avis larger than this.