Regular Tiger disc probably means retail, right? Nope, those only run on PPC Macs. Leopard will be the first Mac OS to boot both architectures from one disc.
If you know anyone with an Intel Mac, any Intel OS X restore disk will boot your MacBook. You can't install any software if the disk came with a different model, but you CAN run the various utilities, such as Password reset. I have done this several times recently, so I'm sure it works.