i'm not PS+ and i don't have PSASBR too... so a cross save digital Vita game really have a seperate save file

yeah I hope that's the case as well..fingers crossed

About the save file, i dont like the system of Vita, its really frustrating, you cant do what you want of your save, you have to delete the save if you want to delete the game -_-

Its a problem when you sell the box version of Mortal Kombat for example, then buy the digital version, you cant take the same save...

I hope they'll change that, or i'll be forced to buy MK ...Again. ( but i dont know if i can have the same save on a second MK... )

Some good news in japan vita front. Monster Monpiece Doing Well; Compile Heart Apologize For Shortages. It's good that it is doing better than they expected.
http://www.siliconera.com/2013/01/28/monster-monpiece-doing-well-compile-heart-apologize-for-shortages/
and Ninja Gaiden Sigma+ free for us plus members. That's a nice move considering Sigma plus 2 is coming next month. It gives people the chance to play through the first game and hopefully get more sales for the second.

Edit: it seems that Demon Gaze is also sold out from Stores. They issued an apolgy and stated that the game will be resupllied by january 29.

Source : http://blog.esuteru.com/archives/6891716.html the article is in japanese.

I want both those games and neither will likely ever be localized.

well done...

niice. Always good to hear

There is a work around.

Use the content manager to copy your game (or game data in this case) to your PC then manually back up the save data folder.

Delete the game after that.

When you download MK from PSN just copy your new game to your PC , replace the save data folder with your back up andthen copy it

back to your Vita.

The save file should work with both PSN and retail version of the game (if both are from the same region of course).

Do you have ps+?

Cause i was able to upload the savefile of my physical UC to the cloud, delete the UC file, download the digital version and then get the savefile from the cloud back to the vita and it worked just fine with the digital version.

I think the same should be possible throught the pc. Just back up your (physical) MK file to the pc, delete it on the vita, download the digital one and try restoreing the file you backed up on your pc? 
I havent actually tried it with the pc but since it worked with the ps+ cloud i see no reason why this wouldn't.

Edit: or just do what nen-suer told you.

Ys Celceta should be on the way for the US release, they work on it : http://www.gamasutra.com/view/feature/134952/a_30_year_fantasy_the_story_of_.php?page=3

"We're hoping the Western audiences will really enjoy our new PlayStation Vita Ys game, Celceta no Jukai, and we're putting a lot of effort into it."

Ok, thanks, you save my life .

I have a Mac, i dont know if its the same way or not.

The content manager on mac is a bit primitive.