I'm kinda with everyone else here about SATA support. Since your motherboard doesn't have built-in SATA support, if you purchase an ADD-ON SATA PCI adapter - it should come with any drivers/software to support SATA on your legacy system - WITHOUT the need to flash upgrade your motherboard's BIOS.
Still, I HAVE run into older Compaq & HP systems that were built around 3rd party OEM Motherboards where flashing these boards "generic", non-HP or Compaq BIOS DID allow me to get around limitations (i.e. hard drive sizes/geometry, access to advanced BIOS settings that the HP/Compaq proprietary BIOS would NOT allow me to alter). If you can isolate the motherboard's actual mfg/model - you can probably do some searching and find compatible "generic" bios that will run on this board. Generally - these boards use either AWARD or Phoenix BIOS.
I recently had to re-flash an old Compaq Presario motherboard with non-Compaq BIOS in order to install a large hard drive. This worked for me as I was able to find the actual motherboard MFG (not Compaq or HP).
I did a Google search on your model number and came up with this link:http://h10025.www1.h...p;product=71721
This link may or may not help - but it points to a 2004 version of Flash BIOS for this particular system.
Let me qualify ALL of this advice with the same advice given by others who have responded to your posts - BE CAREFUL when flash upgrading/replacing your motherboard's BIOS. DO NOT attempt to Flash upgrade (or downgrade or replace) your motherboard's BIOS unless you have a BACKUP plan. When playing around with BIOS changes, you should ALWAYS have a bootable diskette or CD with access to a utility that allows you to RE-FLASH your BIOS back to its original state. If you don't have this capability - you risk rendering your motherboard in a state where you can't use it! You should ALWAYS make a backup copy of your existing motherboard's BIOS and have access to a utility that will allow you to boot and restore that original BIOS in case your upgrade DOES NOT work!
Hope all of this helps.
- John Hook