AnonymousMonk: I apologize. I got confused by the HTML and pod things and have mistaken your post as erraneously gone into my thread.

For all those who might be interested in this matter: the variable I was looking for is
$ENV{'PAR_TEMP'} and with

use PAR;
...
my $Path = sprintf("%s/inc",$ENV{'PAR_TEMP'});
[download]

I get the directory in which I can find the files or directories packed into the PAR archive by the the pp "--addfile" option.

Many thanks to everybody for contributions.

Best greetings and wishes

chanklaus