I would just make notes about the drivers rather than attempting to do a configuration backup. I just never have.
My recollection was with very old RSLinx 2.20 and 2.30 releases, which removed the 1747-PIC/AIC+ driver for Windows 2000 and XP.
Check to see if you're running RSLinx in "Windows 95 Compatibility Mode"; I know that was known to make the 1747-PIC/AIC+ driver not available in XP. To check that, right-click on rslinx.exe in its program file folder and check the Compatability options.