Saving over 1000 individual transparent (!) PNGs to a grid in a single new PNG BUT still transparent (!) What is the best & easiest way?

Question

I've made a collection of over 100,000 PNG icons over the years using Photoshop CS6. All are with transparent background in 72x72px @ 72ppi and sequentially saved as 00001.png 00002.png ... 10000.png in 100+ different folders. A selection of these PNGs should now be saved in a grid in a new PNG, with the transparent background being retained so that the entire background can be exchanged later!

What is the easy way to do this - the best one that works here?

• PS-CS6 itself has no command for it -- or I didn't find it
• PS-CS6 "Actions"/Macro can only be recorded and played -- as far as I know
• xampp on my windows 7 pc - using php to put all selected pngs into a div grid (is easy), but canvas with javascript I don't get the complete grid div saved (only partially) and/or it comes with a white background saved

I also use VisualStudio 2017 (Baisc/C++/C#) over the years to write small, simple programs from time to time. However, writing more complex programs is difficult for me because of the syntax differences, often "#include ..." is missing.

Therefore, according to my possibilities, I am looking for the best, simplest way.

Thanks in advance

Answer 1

100,000 PNG images, Dang.. Manually Plop them all in, One by One. On a transparent grid. Use Snap to Grid. If you put 274 in a day, it would take you about a year to put them all in. Patience is the Key. GOOD LUCK..
One More Thing.... WHY? LOL