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Is it possible to, in Windows XP, dump the memory to the C:\hiberfil.sys file without actually shutting down so that you can continue working, but, in case of a power failure, power back on to the point at which you created the file? Just wondering...
Possible, yes. Recommended, no. How to do it... well that's a horse of a different color. Difficult to say the least. Damn near impossible to say the most.
You would need to create a .bat file, in this file you would have to use the system resources that the hibernation feature does to create the said backup. This means running the completed bat file to take the snapshot of the running process on your computer and where they are, what they are doing, and on and on.
Your .bat file would be twice as large as the 2+ GB hiberfil file that the computer would lag to a halt trying to run all the if statements you would need for each possible running application, process, memory usage positioning and registry item your computer has.
To do all of that, or to hire it out, would be easier to just get a small UPS system to plug into. in a power failure event, use the UPS time to save all work and shut down the computer. Then when power is restored, start back up again.
Not exactly what you are after, but economical and more readily doable. Or start trusting in system restore points :)