Dear Peter,
Thank you so much! Thanks to a part of your message
"The exe on the end of the file suggests to me it is a self extracting archive ( though not a Stuffit Mac .sea) of the Windows type.",
I finally soloved this trouble with AOL Pictures!!!
It was like,
I tried to download the photos with Windows XP PC at my office today, and it worked quite well on Windows XP this time (I don't know why I failed to do last time, though). As you told me, the file with .exe self-opened and the JPEG file appeared on the desktop of PC. Then, I realized, "I'd need some sort of application for opening this kind of file with my ibook, MAC OS X because .exe file should self-open on Windows XP, not MAC OS X!"
I checked on AOL Free software for Mac, and AOL has Photo Management Application for AOL Pictures! Through this application, I could upload and download photos easily from everywhere, like from my friend's PC and anytime I could download those photos from my ibook!
The reason why I use AOL pictures is, I can share my photos with my friends who have Windows PC, and once I upload the photos, my friends could download only the photo they want at any time. I don't have to email and attach a bunch of photo I want to send to them, which would make it difficult for them to download b/c of huge file size. Moreover, I could store my photos on AOL Pictures as a back-up!
Again, I really appreciate your kind, heartful help, Peter!