Hey!

A two step option, that I would use: (pseudo-code)

   open inputfile
      read file into a hash, using the SubCatagory as the key
      (I dunno if you need ALL the data, but I`m sure you know
       how to stuff it in the hash at the SubCat Key (make a list 
       ref. or whatever you want.)
   close inputfile

   iterate over the keys in your hash (unique subcatagories)
      open Subcatagory file
       ...Do your thing on the file, using the data in your hash...
      close SubCatagory file
[download]

Only one filehandle open at a time...

Hope this helps...

GreetZ!,

ChOas

2B||!2B==?;
print "profeth still\n" if /bird|devil/;