Originally Posted by linkju
it says "No addional data: Could not extract XAP file".
Yes, looks like there are some XAPs around which have a different ZIP-Header value. Besides not showing the name, image & description this message shouldn't have influence to the deployment capabilities.
I've replaced the ZIP stack and now any XAP-file can be read. The reading is even a lot faster.
CoreCon2 installer is also online -> if you don't have the Phone Dev Tools already installed you won't have to just for XAP deployment.
XAPDeployX installs a minimal set of required files (< 1MB) on its own.