According to http://www.chicony.com.tw/download/di/driver.asp
, the available drivers were written in 2004. Chicony has stopped supporting their cameras for newer Windows OS versions. I suspect they never made a 64-bit version of the driver for XP 64-bit.
If you had the 32-bit version of Windows 7, you might be able to use the compatibility mode to install the driver. To check your version, click on Start > Control Panel > System and Security > System. Look for your Windows version and check if it says x64. If you see that in the description, you have the x64 bit version. Otherwise, right-click on the driver file from the above site (after extracting the files from the zip file). Choose Properties and the Compatibility tab. Check the box for always Run this program in the compatibility mode and set it to Windows XP in the drop-down menu. You may need to repeat this on the camera software as well.
If you have a 64-bit version Windows Home Premium, you may be better off upgrading to Windows 7 Pro or Ultimate. Then you can download and install Virtual PC and the XP mode, if your hardware can handle that software. This gives a virtual version of the 32-bit version XP that will run your camera. (The CPU needs to have virtualization support and it has to be enabled in the BIOS. Then you need enough memory to give the virtual XP at least 512MB -1GB of memory.) If you already have Windows 7 Pro or Ultimate, just use XP mode. Other virtual PC software exists but they require a licensed version of XP. (If you can find a valid license.) The only issue I've found is that files saved to the C: drive in one OS can't be accessed by the other OS. You have to transfer the files with an external drive, flash drive or burn the file to optical disc.
Dual boot systems with XP and Windows 7 can be set up if you have the XP license. Then pick the OS you need when you boot up the computer. This requires you to repartition the hard drive or have two bootable hard drives. Make sure to back up before partitioning the drive.
I wish that I had better news for you.