There is a command-line utility for deploying DTSX files to an integration services server (and to do lots of other things).
The command will look something like this:
[font="Courier New"]DTUTIL /DestS "%SSISServer%" /Q /FILE "%DTSXFileLocation%" /COPY SQL;"%SSISFolder%"[/font]
I suppose you could call xp_cmdshell and call the command line utility, but this seems like a really strange thing to do. Perhaps you can describe what you are trying to accomplish.