Put tune title, image and following content into a table. Use tabularx to put tune title, image and any following content into a table. This should (a) get the following content closer to the tune image, and (b) stop LaTeX splitting them over a page.

% format for Ye Crie Havock Booke of Dottes test print
  footer "$P0	$T	$P1"
  header "Ye Crie Havock Booke of Dottes"
  measurenb 0
  oneperpage false
  splittune false
  writehistory true