Software Deployment

I do not think so, but if you tell us why you want this we may have another solution for you.

I have set of 5 files which need to be copied , depending on the registry variable.For this i plan to use app search and component condition. But also i need to put a registry key which has the name of the file which i am copying. I wanted to condition something based on the file getting copied.
I am thinking of putting the registry key in the file component only as a workaround.

And what are you trying to achieve with the second appsearch?

Use AppSearch and condition the component (five component holding your different files, meaning one file per component) base on the property as you already stated.

Then I would like you to refer to the "Advanced Custom Action Conditions" article at http://itninja.com/blog/view/appdeploy:-articles:-msi-advanced-custom-actions
Define a dummy property for the registry key (ex. [MY_DUMMY_PROPERTY])
Then use a Set Property custom action to change the value of the dummy property to the value you like in conjunction with &component_name=3.
Should the registry key be named to the filename (ex. filename.ext)? If so you would need to parse the path.