My current hardware is:

Intel Core i3 CPU M 370 @ 2.40GHz
ATI Mobility Radeon HD 5470

At boot, using verbose mode it gives this output:

[WARNING] /Extra/DSDT.aml not found
Using PCI-Root-UID value 0
Using system-type=0x01
efi_inject_get_devprop_string NULL trying stringdata
No DSDT replacement found. Leaving ACPI data as is
Starting Darwin x86_64

It then immediately reboots

This seems to happen no matter what drivers i select from the install disk

I have never created a hackintosh before so i fear i am out of my depth here.

Any help is muchly appreciated, and thanks in advance.