Check your HDD manufacturer's website for their HDD utilities and see if they have a disk overlay utility that fools the OS into seeing the correct size of the HDD (bypasses the BIOS handover.)
If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem. Also please exercise your best judgment when posting in the forums--revealing personal information such as your e-mail address, telephone number, and address is not recommended.
Compaq Presario 5304 hard drive