Import sprite definitions is to "import" a sprite from another gani.
"Add sprite definitions" is used to "add" a sprite. You click the "add sprite definitions" button to the top of graalshop.exe then type in the file name where you see "Image:" and the default text as "SPRITE"...I also believe this is case sensitive. In description you type in whatever you'd want to appear when you move the mouse over the image in the left column or so. The sprite index is where it would appear the left column, make sure it's unique otherwise it would over-write a sprite currently using that index. To get a perfect grid of the image you open it in ms paint or so and move the mouse to the very last bottom right pixel of the image...the first number you see is x, the second is y... Leave x,y as 0 in graalshop but put the lenght and height as the two numbers respectively. Make sure the transparency on the image is also set properly.
Example:
http://forums.graal2001.com/forums/a...&postid=881416