patrick

get some sprint film developer, its good-stuff.
use their push processing recommendations
4 stops is +4, since yours is 5 stops, you might
email and ask what they recommend, i would do +6 to get something on the film
better too much, than not enough ... but that is just me ...
and it is a great all around b/w film developer
so you can use the remainder up on the rest of your film ...


http://sprintsystems.com/?s=push+processing