The Mac OS 9 package contains a 1GB disk image on which Mac OS 9.2.2 is already fully installed. Nevermind the yellow screen with a VRAM partition not found error, it will go past this without any problem.
Just launch the 'QEMU - Mac OS 9.2.2.bat' (or 'QEMU - Mac OS X Tiger 10.4.11.bat') file and wait 30 seconds for Mac OS to boot up.