open BIG, '<bigfile' or die "Couldn't open bigfile; $!\n";
my ($match, $matched) = (0,0);
while ( <BIG> ) {
	s/^\d{2}:\d{2}(.*)$/$1/;
	$match=0 and next unless $_ eq @find[match++];
	next unless $match == scalar @find;

	# If you got this far, you've matched all the lines in the smallfile
	# as contigeous lines in the bigfile. So do something...
	# If you need to know where the sequence of matching lines started (in the bigfile)
	# $. = scalar @find will tell you.
	$matched = 1;
}
close BIG or warn "Couldn't close bigfile; $!";

print "Didn't find the contents of smallfile in bigfile\n" unless $matched;