How to remove a .DMG from my drive ?
 

I did a full backup from my main drive from my G5 powerPC main drive to a firewire drive, using super duper. worked fine BUT I had "Create image disk" option cheked with my main drive as destination.
This morning I found my mac asking to restart ( with the "not enough space" message), the .IMG is taking most of my disk space left on the main drive ( 1.8 gig left .. that's bad !). I tried to delete the .img, send it to the trash but everytime I tried to delete it with empty trash, my system ask to reboot .... bad :(
How can I delete that .IMG file "cleanly". I'm running Tiger 10.4.2 and have to finish a project asap and don't want to mess anything now! Thanks !

I don't know why the system would ask to reboot, but I'd try restarting in "safe boot" (that is, hold down Shift from power on all the way to the desktop) an delete it then.

didn't work, Do I need do open a shell and try to rm it in unix ? or is there a clean way to do it form super duper ? Tx !

Do you have another Mac? It might be best to do this in "Target disk mode".

If you're comfortable in terminal you can certainly try to use rm, though, yes.