@ Narcea
"...type "ren *.* *.jpg". It's wuick and easy..."
Well I think my syntax was better, because the chances are that Wilse's pictures coming from his Amiga would have NO suffixes at all. Your command there wouldn't rename anything, if that was the case.
@ Chunder
I know what you are getting at:
"Windows needs to know what application created the file, in order to open it: do you want to use the web service for help, or select the program from a list" (just typing from memory, not got exact wording)
Now the only value of this is if Wilse had some kind of suffix on his filenames, for example IFF (which he won't, because they are jpegs)
But let's say for instance the suffix was .jx
When the requester I've quoted comes up, he chooses select program from list, then he selects ACDSee from that list AND CHECKS THE BOX 'always use this program to open that filetype.' From now on, every .jx file will open straight away in ACDSee. It gets a different icon from a jpeg, but it still opens.
From there, he could use 'Browse' in ACDSee, select all (CTR-A) and select format convert from the menu, tick apply to all, and then the problem is solved.
But REN * *.jpg is probably quicker and neater
Edit: I used that command to rename my mp3s when they migrated from the 4000 to the PC...REN * *.mp3