How do I get configuration files installed?

[Jim Lynch]

I'm trying to figure out how to add a file to be installed in 
$prefix/bin/lib.

I'm able to add files to bin by putting
bin_SCRIPTS=bin/float.pl bin/work.pl
in my Makefile.AM 

But when I put
bin_SCRIPTS=bin/float.pl bin/work.pl bin/lib/cipher.txt
in there, it simply puts ciper.txt in bin also.  How can I tell it that 
I want that file to end up in bin/lib?

Any suggestions?

Jim.