The application looks to give us an alternative method to connect to and browse the PSN Store. Perhaps more online functionalities are included, but for now it’s merely guessing what it’s going to be.
If you reach error 99, please install the VC redistributables and OpenSSL below.
Downloads:
PSN Infinity v2
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Open SSL + VC
Features SKFU's planning to add:
100% PSN PC client
linux and MAC version
finish the search function
download PKG for guest account
add comic & video stores support
activate/deactivate your consoles remotly
complete account management on PC (like on PS3)
change your PSN Online ID (like in japanese region accounts)
bring back PC to PS3 messaging (if we'll ever get xi-passphrase back)
etc etc etc...
Source