I'm trying to resolve three questions
1) to find FAQ/Manual about simulator included into 3.0.2 JavaCard Connected platform
2) which commands for Card Manager of simulated default JavaCard are supported
3) how to upload simple applet (ex. HelloWorld from JavaCard 3.0.2) using Card Manager applet simulated on Default javaCard Connected platfrom simulator available from NetBeans 7.2
From my understanding, NetBeans uses the CREF executable from the JCDK for simulation. You can check the documentation (developer guide etc) from the JCDK for more details. The CREF emulator uses a custom applet loader so it does not use standard GP commands and will be different to a real card. As for loading your applet, you should be able to run from NB and it will start your emulator and deploy your code. I do not use netbeans so cannot really comment further.