Creating a new file type in NetBeans

[Basant Kumar]

Hi,
This is my second question in succession.
Actually I am in a deep problem.
The problem is I got a project called Netdemo.
this netdemo requires
one Jar file- "DVVP.jar".
one dll - "DVVPJNI.dll"
3 files , "node.d","top_map.v","node_hot.d".
[I donot have the idea about the file types of these 3 files].
I want to build that application on NetBeans Environment.
For DVVP.jar, I used Mount Jar to import the jar file in the project.
DVVPJNI.dll is put in the class path from where it is picking up.
and I have put the file ".v" and ".d" in the folder where all the class files (NetDemo.java) etc has been kept.
When i compile the java file it gives no error , but when i execute it it gives VM error
when i click the file top_map.v in the explorer window of NetBeans , i get the status as "Unrecognised File".
No wthe Question is how can i make these 3 files visible to the project.
I tried for new Templates, but it does not work. Migth be i am doing wrong here.
Please help me out regarding this,
Does Netbeans uses a predefined set of files or we can create our own file types.
If we can create our own file types, what is the way out.
Thanks in advance.
Basant