In that case, you may be interested in purchasing the Mimina Lyar Chronicles PSP exploit game from the
USA PS Store. (I haven't attempted to buy games online from an out-of-region PS Store, so I couldn't tell you how to access and purchase it if you don't have a USA account. Sorry about that!)
Exploiting Mimina Lyar Chronicles will allow you to install PSP backups and homebrew, through an installed TN-V or ARK bubble. This bubble is installed to your Vita's home menu permanently.
TN-V allows you to set up the old, official PSP XMB, allowing for old PSP plugins and features. ARK is just an alternative loader that's pretty much defunct today due to its lack of features that TN-V otherwise has...
But that's only if you're not interested in the native Vita backups and homebrew. You
may want to instead take the HENkaku route and
manually update to 3.60 for PS Vita backups and native homebrew, unlocking the full potential of the Vita! You can also load and create native game plugins just like the old PSP days, as well as making use of a vast array of emulators, utilities, and fan translations that are being constantly created!
I should also turn your attention to the
recently-announced ePSP hack for 3.60 by TheFlow. I haven't the slightest of ideas when this will be released, but this will also allow for PSP backups and eCFW (such as TN-V) in the future as well!
Hope this helps you pick your path!