Haha i don't wanna to show this but it's possible to use remote play PS Vita on a 3.55CFW/3.41 (don't want to show because it doesn't works good)
the astuce is to register the PS Vita as a mobile phone (but the quality of the remote play is not good) Sony release the 4.0 to up the resolution and add the PS Vita register mode actually with this method you use the resolution of the PSP remote play
To play some games in remote play, you just patch the eboot and active remote play PSP
But it's so worst, i mean it's too blury than you don't see anything, it's difficult to play.
Also have a better way to add support of the PS Vita (you need to add a new entry on the xml and port the new sprx on 3.55/3.41 to be load, libmtp/mtpiniator/libusb)
Even if you patch the games add support remote play PSP, sometimes it doesn't works and for almost all the games, you need to patch completely the games to have a better support of the remote play.
I can confirm this HeyManHRU but with a so worst quality of picture
By the way, remote play = streaming, add the PS Vita as a mobile phone works but the bandwidth allowed on this mode that use the similar one from the PSP Remote play mod, it's so light for a PS Vita and not enough remember that the PS Vita have a OLED screen 2x the resolution of the PS Vita, imagine how worst it was to use the remote play on the PSP (big laggy, blurry details, etc...) it was difficult to play.. now imagine this mode used on the PS Vita (it works yes but to hurt your eyes and you don't have any fun to play like that)
Like i said the release of 4.0 was here for that, to give more bandwidth allowed and up the resolution of this one.
Every games can be compatible remote play PS Vita but it's hope to Sony to add more features to give the best quality for that and also the dev to patch the games.