Simulate attack or intrusion to cause a signature trigger

Is it possible to simulate an attck or an intrusion , which will trigger any particular signature id in an IDS model 4250. ( on a host which IDS is sensing ). This will enable us to actually check or see an intrusion on real time dashboard on IdS event viewer. Are there any scripts or utilities available which will cause triggering of IDS ignatures. ( with particular id ).
Thanks in advance

Hi everybody:
There are good suggestions in this post, but I want to add one more comment.
What you are looking for is named a "proof of concept".
It is difficult to test every signature, because you need specials tools and often it is very difficult to find (if exist).
Nessus (mentioned early in this post) is an vulnerability assesment tool and have several kinds of attacks (I suggest you try with knoppix -std because it is already instaled, but you need minimum knowledge about linux).
Another suggestion for specifics vulnerability, visit http://www.securityfocus.com/bid.
If the vulnerability has a proof of concept, you can find it in this web for sure!.
Another problem is that exist the sign for prevent this thread :-P
Hope this help.
Alberto Giorgi from spain (new kid in this block)

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