Lime Imac Dv 400 wont boot

OK,
i was trying to install mac os 9.2.1 support on my computer and i couldent get it to install, so i started messing around with the startup disk settings, and i selected the netowrk sartup, well that obviously didnt work so resseted the PRAM! which i problebly shoulden't have done . Anyway, now it just has the famous floppy with the question mark, and i've tried holding down option to select the drive but to no sucess alog with the x button. I dont have the macosX cd, only 8.1, 8.6, and 9.2.1 ! so what can i do other than take it in to get it fixed?
Thanks!