Will new macbook installation disk work on old macbook?

Hi

One question, my old macbook came with the old disk that is tiger OS.
The new macbook came with Leopard OS.

Will i be able to use the new Install disk to install Leopard on my old macbook?

The old macbook is
Model Identifier: MacBook2,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache (per processor): 4 MB
Memory: 1 GB
Bus Speed: 667 MHz

If not do i have to buy the leopard software somewhere?
Thanks

The disks shipped with the machines are machine specific. They do not contain all the drivers you need for another machine and will not install. (This over and above it not being within the EULA to do so anyway.)

Yes, you would need to purchase a retail copy of Leopard. Or at this point in time, wait until SL and get a Family Pack of it for installation on both your Mac's.