Can I make my precision 690 a 64 bit system? - Need Help!!!

Here's my workstation configuration:

Processor . . .Two Intel® Xeon™ processors with 533MHz front side bus and 512KB L2 cache 3.06GHz
Chipset . . .. . . . . Intel E7505 chipset
Memory . . .1GB -ECC 266 MHz DDR memory standard; 4 DIMM slots - 4GB ECC or non-ECC maximum
Flash BIOS . ..4MB Flash memory for system BIOS, setup, Plug-and-Play DMI 2.0s (optional) and SMBIOS 2.3.1 support
Graphics Support . . . . nVidia QuadroFX 1000 AGP 8X, 128MB Dual Monitor (VGA or DVI)
Hard Drives Two (2) Integrated Ultra 320 SCSI including high-performance RAID 0: 10,000RPM: 36GB,
Hard Drive Controller . .integrated dual channel/connector, bus mastering ATA/100
Integrated single channel 64b PCIx U320 SCSI Controller w/ high-performance RAID-0
Network Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Integrated PCIx 64-bit Intel 10/100/1000 Gigabit1 Ethernet
Audio Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . .Integrated Analog Devices AC'97 Audio
Optional Sound Blaster® Audigy II with onboard 1394