Hi @zhuma,
Why would you want to install the wizard into the KNIME AP installation you are starting? That is really not necessary. The wizard needs to be installed into your eclipse installation, not into KNIME AP.
Yes, in fact I recommend you to do this in fact. You can just take the code from this example project, it contains all the basic code that the wizard would have generated for you.
If you want to distribute your extension, I recommend you to use maven/tycho to build it. We also have a template for that:
Don’t worry if that is a bit complicated, you will not need it right away when you start to develop nodes.
best,
Gabriel