Getting errors, can't turn my PC back on, need help please!

Okay, I changed that little 3v Lithium cell battery in I believe my motherboard because I was having PC issues related to losing date and time. When I did this, I get error messages;

Reboot and select proper boot device........

and

No drive attached to Fast Track controller. The bios is not installed.

I did this last night;

Restart your system and boot into the BIOS.
Go to Advanced, Onboard Device's Configuration, Onboard Promise Controller and change the setting to disabled.
Press F10 and agree to save the changes and Exit.

I am still getting that top error message. I changed the boot sequence to the floppy, the 2 different drives and whatever the fourth choice was and none of those options seem to get me back online. I was hoping someone out there could help me with this issue. If you need any more info, let me know and I will get it for you. My PC config is below. Thank you in advance for all help offered.
Thank you,
Don

My PC

Thermaltake SHARK VA7000BWA Black Aluminum ATX Full Tower Computer Case

Western Digital Caviar WD800JB Special Edition 80 GB Hard Drive

ASUS P4P800-E DELUXE Socket 478 Intel 865PE ATX Intel Motherboard

CORSAIR XMS 2GB (2 x 1GB) 184-Pin DDR SDRAM Unbuffered DDR 400 (PC 3200) Dual Channel Kit System Memory

ASPIRE ATX-AS520W BLACK ATX 520W Power Supply

ATI 100-435508 Radeon X800XL 256MB 256-bit GDDR3 VIVO AGP 4X/8X Video Card

CREATIVE Inspire P7800 90 Watts 7.1 Speakers

Logitech Elite 967234-0403 Black 104 Normal Keys 19 Function Keys USB + PS/2 Wired Standard Keyboard

HP OfficeJet 4215(Q5601A) 17 ppm 4800 x 1200 dpi Color InkJet Multifunction/All-In-One Printer

Press delete while you are booting up every 10 secs. Set all the options you can. You want to boot from the 80 GB hard disk: WDC...
The Promise controller is for RAID. Disable RAID. See here for more help understanding your options:

The Definitive BIOS Optimization Guide

http://www.techarp.com/freebog.aspx

No, the only sequence that is important is the boot drive. You can set to boot from CD-Rom and floppy for 2 and 3.