Basically externals are treated just like abstractions. One way to use it would be to just put the external in the same folder as your patch.
For more in depth information you might look at section "3.7 dealing with files" of the manual.
Guenter
On Thu, 4 Mar 2004, greg kellum wrote:
Hi,
I just (re)installed Pd on OS-X using the Pd OS-X installer. The Percolate external doesn't come with this distribution. So I would like to install it myself, but I haven't been able to figure out where the OS-X installer writes its files and how one adds new externals to the installation. Could anyone help me with this?