OK, so melding together the discoveries and knowledge of these two hepcats - er, honorable monks - we might have something like this, maybe?

#!perl -w

use File::Find;
use Win32;
use strict;

find( \&wanted, "J:/ie5cache/Temporary Internet Files" );

sub wanted   {

my $replacement = 'InfoTip="This is the IE cache folder"';
 if ($_ eq 'desktop.ini') {
   my $DOSname = Win32::GetShortPathName( "$File::Find::dir/$_" );
 my $SRT = system( "ATTRIB -h -s -r $DOSname" );
 warn "\nUh-oh, not going to work? -\n$!" if $SRT;
 print( "Found $File::Find::dir/$_",  qq[:\n]);
 open( IEDF, "$File::Find::dir/$_") or die $!;
  my @contents = <IEDF>;
 close( IEDF ) or die $!;
   if (@contents)        {
      for (@contents)       {
        s@UICLSID\=.+@$replacement\n@i;
      }
      open ( IEDF, ">$File::Find::dir/$_") or die $!;
      print IEDF '',@contents,"\nreplacement made.\n";
      print '',@contents;
      close( IEDF ) or die $!;
   }
 }
}
[download]

There is only a little fruitfly in the ointment. The little line "InfoTip=This is the IE cache folder" does not seem to do anything in my Windows NT4 Explorer interface. Maybe this is (I think so) a Win98-specific innovation?

Good work anyway brothers, I like seeing my cache in ordinary perspective so I have some greater control over the contents.

Intrepid

The information about the desktop.ini file can be found here. Information about namespace extensions is here.
Both of these topics are listed on Microsoft's MSDN Library under the Shell Programmer's Guide section under the Platform SDK docs.

Sorry about the OT posts - maybe I'll find some way to get Perl to let a user create a custom desktop.ini for penance.

Guildenstern
Negaterd character class uber alles!