Most of the directories accept sub pages, they mention in their guideline. One of thing you can do is go to vmoptions directory list and look at the directories with *, they accept inner pages of websites.
Most paid directories accept internal pages. Here is a list of free directories that accept internal pages.
We are too accepting Inner pages if they are not related to any Adult stuff....Other than that you are more than welcome to List as many pages as you want for FREE.
Here's a list of deep link web directories. You can use the search to narrow the list to your niche, PR, etc.
Subpages = Deep Links. Almost all directories using qlWebDS accept deep links/subpages. Search in Google for the following: Powered by: qlWebDS Premium or Powered by: qlWebDS Pro and you will get hundreds of them.
if some dir doesn't accept inner page then u will be noticed in their guideline before submitting read that.
I thinks you should have to used deep linking Directory list from Directory critic or used paid directory submission for that inner pages submission.