I've posted the nifty Keyframe Jumper to the Adobe Exchange. It adds two great commands to Flash: "Next Keyframe" and "Previous Keyframe," which allow you to instantly jump from keyframe to keyframe, rather than nudging one frame at a time. It also loops from the last keyframe back to the first, and vice-versa. Thanks to Beau Brewer to helping me get the script working just right. This little beauty has saved me tons of time. I hope anyone who animates in Flash frame-by-frame gives it a try.
Once you download the file, open the Adobe Extension Manager, then click File > Install Extension. Browse to the downloaded .MXP file. It will show up under the "Commands" menu once it's installed. I like to set the keyboard shortcuts to Alt+. and Alt+, as it is in Maya.