In LBP2 you can import your own LBP1 backups, but not other people's LBP1 backups.
How to install:
1. Format a USB stick with Master Boot Record (as opposed to GUID Partition Table) and FAT32
2. Put the decompressed folder into PS3/SAVEDATA
3. Copy it to the PS3's main storage
4. In your pod, open the profile settings and import the save data (you should probably do a backup first)

Savefiles by tasryse, Metraberryy, Genrist and kadiwa.