extended drum kit notation / creating timpani in 5 line drum stave

Hi and thanks in advance,

I am using Musescore version 1.1
Windows 7

I'm writing a piece for drum kit including two timpani. The drummer requested that the timpani be a part of the normal five line drum stave.
1.) I open 'Edit Drumset' and go to the note that I want (corresponding to a four line bass clef with A in bottom space) Pitch 2; Note D-2
2.) Now I input 'notehead' - normal.
3.) Instead of showing the note at D-2 where I want it on the stave, the note appears at middle C (through the top line)
4.) I try other notes and get the same result, the note I create always appears at middle C (through the top line)

Is there a way to control where the new notes I create appear, or am I limited manipulating the presets?

Also, as a separate and unimportant issue, it would be nice if I could assign the timpani notes to their corresponding timp sounds? Is there a way to do this?

For the first request I've had a look on the forums and user guide and couldn't see anything. The second is less important and I haven't had a thorough look in the forums, so feel free to ignore...

Thanks heaps,

Stu