Upgrade from RH 6.1 to RH 7.0 on a machine with no floppy drive.
(Graphical installer)
Selected and customised packages.
Unclicked 'create boot disk' on lilo configuration screen.
Next page: package dependencies existed so clicked 'back'.
Now back at lilo page and saw that 'create boot disk' had been checked again.
Unchecked it, went back to package customisation, corrected some selections.
Clicked 'next', got to lilo stuff again and 'create book disk' was again
checked. Unchecked it again.

(Upgrade completed successfully and did not stop to create a boot floppy,
so it must have remembered it properly in the end.)