Hi,
I do not know if this is possible but there is another solution.
instead of using the spool use the internal table that goes into the ALV and call a smart form .
There you can have a logo and it is a more flexible solution for printing.
If you go this way you need to define table type in the SE11 or use external class (SE24) to store your types.(personally I prefer SE24) .
A sample of using class type in smart form:(see the attached files in this posts)
Deeper Dive into Deep structure - part 1
Deeper Dive into Deep structure - part 2
Deeper Dive into Deep structure - part 3
Regards.