FM7 (mac) open audio file named in field

[jef chippewa]

hi, trying to find a way to open specific audio files for individual 
records, via the field FileName_calc (a reduced info title for the 
record).  have managed to open documents before using Send Event, but 
i can't figure out how to do this for filenames whcih change with the 
record.

eg. in record 10001 documenting "New Piece" by Jane Doe i want to be 
able to click on a button beside FileName_calc to open up the file 
10001_doe-ja_newpiece.aif using Peak (sound app)

i also tried to get this happening using a container field, but that 
hasn't been successful; also i had to manually select / enter the 
filename.

am i right in thinking that this actually can't be done in FM7 but is 
possible in 8?  i actually have FM8 (haven't installed yet) but the 
sound engineer who will be using this database only has FM7.

any suggestions appreciated.  even a partial solution would be 
appreciated, if i could at least use the button to open up the folder 
In Finder) where the sound files are stored...

cheers,
jef