PackageMaker basic question

Hi

I am a newcomer to PackageMaker and need it to do something quite specific. There are two elements to the package:

1. A sampler instrument file (for Logic Pro) - this need to install to the user's home directory and I have figured this part out

2. The sample files (a folder of audio files) - these could be installed anywhere; what I would like the installer to do is ask the user where they would like to install this part only (element 1 location is not optional)

Is that possible?

Thanks in advance