No you can not, please review the information below from Microsoft regarding this issue. 
Microsoft Knowledge Base Article - Last Reviewed: 7/14/2002 (1.0) Keywords: kbprb KB324756 
324756 You Cannot Simultaneously Use Multiple USB Scanners in Windows XP This article applies to… This article was previously published under Q324756 SYMPTOMS You may not be able to install multiple 
Universal Serial Bus (USB) scanners in Windows XP and use them simultaneously. For example, when you 
attach two scanners to the Universal Serial Bus (USB) ports of your Windows XP-based computer, the first scanner that you connect is detected correctly; however, when you connect the second scanner, you may experience one of the following behaviors: The second scanner is listed in Device Manager as "Unknown Device". -or- You receive the following error message (it is displayed next to the scanner in Device Manager): Windows cannot load the device driver for this hardware because a previous instance of the device driver is still in memory. (Code 38) CAUSE This behavior occurs because the Usbscan.sys driver cannot be used simultaneously by more than one scanner. RESOLUTION To work around this issue, connect and use one scanner at a time. To use the second scanner, disconnect the first scanner from the USB port, restart the computer, and then connect the second scanner. To use the first scanner, disconnect the second scanner from the USB port, restart the computer, and then connect the first scanner. 

MORE INFORMATION For additional information about how to manage devices visit Microsoft's website www.microsoft.com 
this article applies to: Microsoft Windows XP Professional Microsoft Windows XP Home Edition