Thank you, Rizvisa1. What you offered, while a bit "complicated", may work and is something I may play with when I have a little time. Since my post on 2/20/10, I rediscovered the method I had used previously to effect the changes I desired in the file names. It makes use of the '?' as a wildcard (not '%' as I had thought).
I begin with file names that are of these types (happen to be 8.3):
As I said, we want to render them *.H100.plt
The solution is SIMPLE; you need two commands that will work in tandem:
:: Change 'h10' to 'H100'
ren ???.?h10.plt ???.?H100.plt
ren ?????h10.plt ?????H100.plt
The first line will convert the file names w/ decimals in the "front part", e.g., the first name above.
The second line is necessary to convert the second type above, which has no decimal in the front part of the file name. Again, both are necessary to get the job done: they are complementary.
The result will look like this:
I hope this will benefit others who come to this forum w/ DOS script questions.