i have found many good router simulators. it was really hard looking for them in the chinese and romanian sites :P
hope they will be helpfull for u as they were for me
http://ftp.boson.com/download/boson/bos_rsim.exe (16.29MB)

http://www.zhanglin.com/network/soft...os_rsim3.1.exe (19.19MB)

http://tips.9hao.com/superexam/ccna/...nasim.v3.0.zip (12.67MB)

http://www.zhanglin.com/network/soft...os_rsim2.1.exe (14.62MB)

http://tips.9hao.com/superexam/ccnp/...tor.v2.1.0.zip (14.73 MB)

http://tips.9hao.com/superexam/ccnp/...0Simulator.zip (5.19MB)

http://www.nedlinux.nl/~m.smeets/temp/ <--- here u will find RouterSim CCNA 3.0