Here is apple's take on the subject.
http://support.apple.com/kb/TS1929
Try this:
1) on your eMac update the machine to 9.2.2
-- ( it needs to be 9.2.2 I think & do not know if you can update to 9.2.2
on Mac OS X. I think you can update on X, but not 100% sure. )
2) get a flash drive
3) format to flashdrive to Mac OS extended
-- ( guess you could use journaled. )
-- ( need to perserve resource forks.)
4) copy the folder
System Folder
to the flash drive.
-- ( this is the mac os 9 folder. Only the Max OS X will/may have the 9 on the folder. )
-- ( do not move it on emac like to the desktop etc. )
5) copy to your iMac.
6) Bless classic folder. See http://support.apple.com/kb/TS1929 for how.
Let me know how it goes. Could try it out since I have Classi running in a partition on this machine.