Where can I find or make a script for focus stacking using Raynox DCR 250?

I don't think you need to use a special "script". There are some softwares that do the trick and are easy to use.

If by any chance you're using photoshop, this guide will help you:

focus-stacking-made-easy-with-photoshop

I was using it to stack 20 photos and it works great for me.

I have just written a focus-bracketing script for closeup lenses, including the Raynox 250. Here is a link to my article, which contains documentation of the script as well as the script itself: http://www.dpreview.com/articles/9780512447/focus-bracketing-scripts-for-macro-setting-and-for-closeup-lenses Here is another link to some outdoor stacked images made using the script http://www.dpreview.com/forums/thread/3508821

Really old thread. Anyway, it seems people confuse 'stacking' and 'bracketing'. Bracketing is used to capture a number of pictures of a scene while varying a parameter, exposure, focus, what have you. Stacking is a post processing technique for combining bracketed photos to create HDR or increased depth of field, for instance.

For the original posters question, long time back i loaded up my Canon A720IS with the hacked CHDK firmware which facilitates scripting and wrote a script based on the hyperfocal distances. It worked ok and stacking the focus bracketed shots did result in enhanced DOF.

Some google fu came up with https://chdk.fandom.com/wiki/UBASIC/Scripts/CanonA640:_Focus_Bracketing