Just downloaded X3C and I have Addictive Drums and can use as a stand alone but how do I configure it for X3 to use it?  Forgive me if this questions has been asked but I looked and kept getting results for addictive drums and X1 or X2

When you open X3, you should see it listed when you go to ad a synth.  If you don't see Addictive drums as one of your synths listed, go to your plug-in manager and re-scan plugins.  If that does not work, make sure the folder that contains the vst file for AD is among the folders Sonar scans.  If this sounds foreign to you, let me know, and i will post more detailed instructions.

If you have AD dll in the VSTplugins folder X3 will scan it. 

Not sure where the dll is located I downloaded everything as a stand alone, I have added both XLN Audio folders in program files and program files 86 and still no syth for AD.  Would anyone know the name of the dll so I can search for it?

Addictive Drums.dll

I think by default it would install to C:programfiles(x86)/Vst plugins

Found it in a strange place C:\Program Files (x86)\Steinberg\VstPlugins thanks for every ones help

It's not a strange place. VST is a software technology created by Steinberg so many programs will create that folder by default. Many installation programs allow you to change default locations to one of your own choice. As long as Sonar knows to scan that folder that's the main thing.

Next newbie questions for AD is can the step sequencer be used with the drums sounds of AD?  And if I am correct AD does not have a way to setup custom drum patterns correct?

I'm still relatively new to the world of AD, but to answeere your questions to the best of my knowledge:
 
1) Yes, AD can be used with the step sequencer.  It acts a little wonky if you use a drum map with step sequencer, but I never use drum maps when using step sequencer.
 
2)I know of no way to set up custome drum patterns in the program itself.  They offer low cost midi packs to ad more patterns.  You can use any midi drum pattern to trigger AD.  SOme third parties sell patterns already mapped to AD or you can create a drum map.  A couple of users have already made drum maps for AD to make playing standard midi drum patterns easier.  I think one user was subjacent.