Assuming you have already been approved for a publisher license and you have PSM SDK 1.21.02 installed on your desktop/laptop successfully and the dev app installed on your vita!
Make Sure PS Vita is connected to PC via Usb
1. Open PSM Publishing Utility and click on "Key Management" You should see a little icon with a key and + icon at the top (click on it) it will now ask you for a key name (NAME IT ANYTHING YOU WANT) hit OK.
2.Enter Your Sony Entertainment ID email and Put in your Password (Make sure its the psn id you applied for psm with) then click "OK" It will now generate your key.
3.In PSM Publisher Utility under "Application ID List" click on the + icon and by app.xml (browse for the demo app.xml file) It will be located under C:/Users>Public>Public Documents>PSM>sample>demo>(Demo of your choice)>app.xml then hit "OK"
4.Assuming you still have the PS utility open (under device list it will show your vita connected) Below at the bottom click the "Export Device Seed" it will ask to generate seed "Click Ok and save it somewhere" once that is done click on the "gold key icon" with + on it and generate the key (put in your Sony ID and Pass) then hit "OK"
5.Now if you followed the steps Correctly you will have a seed and key next to your vita device under "Device List" In PSM Utility.Now you done with that part
6.Open Windows cmd (Command Prompt) and type this "setx MSBUILDENABLEALLPROPERTYFUNCTIONS 1"
after you have done that hit enter and it will say SUCCESS : Specified Value was saved
7.Now Open Psm Studio and click file then open, go to the demo and "double click" on the .sln file
8.At the top there will be a box that says "Playstation Mobile Simulator" click the box and choose "Playstation Vita ON" (make sure your vita is connected and psm dev app is open before doing this)
9.Now at the top Click "Run" and the game will Now install and launch on your Vita!
Hope This tutorial Helps!
Goodluck
Please follow me on twitter @Avidity_X
Thanks
Advertising