Hi Rusty,
I found the way to it.... first, I copied (from inserted MicroSD card) the folder of my interest (in this case, an Images) into the built in SDCARD storage. Hence, I am having a folder called "Images" in it (the SDCARD). Then, I used the following code (in bold):
imageFolder = "/mnt/sdcard/Images/"
If File.Exists(imageFolder, "") = False Then
....
(code modified from ScrollView example)
Once running the modified ScrollView code example....bingo, the images pop up into my Asus tablet screen!
Long live B4A!!!!