Photoshop 7 Image Pack Difficulty

Hi everyone, I'm having a little bit of a problem.
I recently switched from PSP8 to PS7. Iv'e mostly got all my initial questions answered, but now after checking the memorials and playing around, I still can't figure out how you can use imagepack brushes. Iv'e checked the memories, and I dont know if Im not looking correctly or what, but I can't seem to find anything useful or at least, anything I understand.

All help is appreciated, thanks in advance =)