Need assistance on the 1412

I have some questions in ref to my 1412 Magellan. Ive owned the thing for I guess a year and has really helped me out of a couple a jams, I love this thing

My question is this;

I want to install several PIO files from this site and notice that there are also sound files and Bmp files associated with those PIO files.

How do I install those files so that my 1412 will associate those files with the PIO files that I have installed or is this done automatically whenever installing just the PIO file itself.

If I look at the file structure of the 1412 I see I have the HDD which looks like this:

CPOI
SOUNDS
SPEECH
Components
common
data
g2p
pp
synthesizer
voicefront
xlit
map_binary
rssolv4
USBTrans

Then there is the SD Card called TFAT but there are no sound folders there but it there where I am installing my PIO files in a folder called USR/CPOI

So, where and how would I install these picture and sound files??

Thanks for any assistance.