dual booting ubuntu with macOS.X

i decided to spice up ma life by dual booting my Ubuntu 8.04 with  Mac.OS.X Leo4All on ma HP 530. this is how i went about da whole stuff. i first installed Mac and after battling it out with the installation, everything went out as planned. so now time to install my Ubuntu Hardy.

After installing the Ubuntu 8.04 (Hardy), and restarting, i found out that ma macOS was not included in ma grub boot loader. ma machine just boots into Ubuntu and i have no access to MacOS.