That's a regular, more or less basic scene. 5 minutes is OK, but I'm surprised it takes that much longer with IL.

How long does the scene take in P7 or Poser Pro (not sure what you've got) using similair render settings?

Artwork and 3DToons items, create the perfect place for you toon and other figures!

http://www.renderosity.com/mod/bcs/index.php?vendor=23722

Due to the childish TOS changes, I'm not allowed to link to my other products outside of Rendo anymore :(

Food for thought.....
https://www.youtube.com/watch?v=pYZw0dfLmLk