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If you took them sequentially can't you sort them by most recent?

Assuming they're in the desired order to begin with, try this...
http://www.bulkrenameutility.co.uk/Main_Intro.php

What about making a Gif of them?

Maybe this'll work on whatever version of Windows you have?
http://lifehacker.com/196573/rename-your-digital-photos-in-bulk

You can easily do batch-re-naming with softwares like XnView for example. Try it out, is really simple.

Not sure about the renaming, but when I was a kid I threw everything into Windows Movie Maker (yes, I know), selected all, and changed the length to like 0.06 seconds or something.

In Premiere, you can just throw all the clips in, and ripple edit one of them to be one frame long, which is much more accurate.

you need to order them or just give each a unique ascending number?

i use speedcommander (something like explorer)
just block all files and press F11 to bulk rename

or use "renamer" or "bulk rename utility" < both free, i download from liberkey.com (for portability)
these 2 have so many option, so it might be confusing at first