doc365,
First, we all here (at least most of us

) will say that you are much better off putting together a lab of real Cisco routers and switches off of eBay - 3 routers and 3 switches and that lab will be a great foundation for a CCNP lab, just check back any of the previous posts on the subject!!
You might want to check out the FAQs here - there is a list a lots of websites with different material for Cisco Certs - lots of it FREE.
Boson has one of the best Cisco Sims on the market - not cheap but they do have a FREE download so you can try before you nuy - I do not remember what is diabled in the trial version - worth a try -
One of the versions of the Sybex CCNA Study Guide by Todd Lammle comes with a pretty good router sim - but you are paying for it with a GREAT book for the CCNA!!
I did not see the 6th edition with the router sim, seems the sim is sold seperate, but the older books have it - might be able to find the older book for a song at Amazon or eBay with the router sim -
You also have Dynagen which is an emulator that runs a real Cisco IOS (you have to find IOS copies) just like a router would, you can read more here -
or
Or just "google" free router sim" and follow the links !!!
Just remember in some case they arre just as good as what you paid for them
Hope this helps!
E.A. Broda
CCNA, CCDA, CCAI, Network +