Version NG or NGX include build in 15 days trial "all-included" license. It is activated after fresh install. You can use more and more time either reinstalling FW or trough CIS reset and FW reinitialization.
Each CD kit include printed some-digit-code. You can register it on the
www.checkpoint.com/usercenter and get 30 day trial. The same code can be generated by any checkpoint partner in single click. You only need to register to the user center and provide you e-mail to the partner.
You also can download SmartConsole from the Checkpoint (management GUI only) install and run in the demo mode. Demo mode is pretty cool.