Are you wanting an ImageCellType or the picture for a ButtonCellType? You should be able to set either one to the index of the image in the ImageList. If you can post some code you are using we can see what it is you are trying to do and point you in the right direction. Here's an example for an ImageCellType...
Dim img As New FarPoint.Win.Spread.CellType.ImageCellType
Dim image As System.Drawing.Image = ImageList1.Images(2)
FpSpread1.ActiveSheet.Cells(0, 0).CellType = img
FpSpread1.ActiveSheet.Cells(0, 0).Value = image
Bob M.
FarPoint Technologies, Inc.