Presenting successive file names in 'Open'

[Graham Samuel]

Folks

I'm not sure how to approach this problem:

I want a user to see the contents of a series of text files, all in the  
same folder. Let's say the files are called A01,A02... G99 or something  
like that. The sequence of operations is -

1. The user is offered a normal 'open' dialog to select a file,  
initially navigating to the folder in question and picking A01 to read.

2. The user looks at the file, does some action and disposes of it.

3. The user usually then wishes to look at the next file in the  
alphabetical sequence (A02 in my example, but it might be any text  
string). Clearly she/he can navigate to this name by:

  a) remembering the name of the last file looked at;

b) scrolling down to the file below the last file looked at in the  
normal 'open' dialog

If there are a lot of files, this scrolling becomes tedious on most OSs  
(e.g in OSX the OS 'open' dialog doesn't hilite the last file read, nor  
does it scroll down to it), so I would prefer to propose the name of  
the next file in the sequence in the 'open' dialog for the user to  
accept or reject.

What would be the best way to do this? So far I've only thought of  
traversing the folder somehow before the user starts work, and putting  
all the file names in a list field for the user to pick from. Seems  
kind of overkill, though.

All thoughts gratefully received.

TIA

Graham
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Graham Samuel / The Living Fossil Co. / UK and France