Rently upgraded from an eMac to iMac and can't find my old system discs. I want to wipe and reinstall everything but can't do it without discs - anyone know if its possible to by these seperately or use discs from something else?
If you just bought your iMac (intel) it should have come with disks. Get back to the seller and ask for them.
It is standard Apple practice to sell a computer
with its disks.
To your question in general:
It depends on what sort of disks you have. The grey ones are machine specific and will not usually install on another computer.
But your profile state you have 10.4.10 so did you have Tiger on the eMac, and was that installed by you from purchasing black retail Tiger 10.4.6 disks?
If they are Universal, meaning that they have both the PPC (for the eMac) and Intel code (for the iMac Intel) then you could use them.
However if they are grey DVD's specific to the eMac then they won't work on your new computer, at least because they are not Intel code.
If this is the case you may need to buy some new Tiger Disks.