How to install Redhat Linux 4.0(RHEL) on my dell Inspiron 1520..plz help

Hi i tried to install Redhat Linux 4.0(RHEL) on my dell Inspiron 1520 notebook. It has a 160GB SATA hard drive but when enter into the GUI mode of RHEL and proceed to partition either automatically or with Disk Druid, i get an error message which says that "RHEL did not detect any drives to create partitions on".

I tried to create a RAW partition and one with FAT32 but that did not work. I really want a multiple operating system on my notebook i.e Windows VISTA and RHEL. Please could someone help me with installation of RHEL only on my Dell notebook which is not installing due to the above mentioned problem.

Thanks in advance for your help!!!