First, it's not a Perl snapshot, it's a Samba snapshot that is written in Perl. The name "Perl Snapshot is Not Incremental Backup" doesn't tell me what this project _is_.
Second, the whole "is not" thing is used to create recursive acronyms (such as "WINE Is Not an Emulator"), so unless you call the project SINIB, as in "SINIB Is Not Incremental Backup", you may as well drop the Is Not part. I'm not too fond of recursive acronyms anyway--it's a contrived cuteness that's been overdone.
I recommend changing the name to something more descriptive yet shorter.
I ask that people, please, from this point forward, do not write any more PHP photo galleries. Instead, spend your time adding cool features to others. You have tons to choose from. Certainly PHP can't be so bad that its easier to write one from scratch than add to someone else's, is it?