At my knowledge you cannot save data directly as an xls file.
But you can save data as a csv file and recuperate with Excel.
The content of a Table control can directly be saved and loaded as a csv file with the SaveCSV and LoadCSV Methods.
If you add an image to an Excel file on the desktop and
- save it as a *.csv file, the image will be lost !
- save the *.xls file to the PPC, the file becomes a *.pxl file and the image is lost too !
In both cases you cannot handle images with Excel.