sounds like it can't find the Xpm library. trying searching for it on your hdd (updatedb; locate Xpm;). it's likely that your Xpm lib isn't named "libXpm.so", but rather something like "libXpm.so.4". i'd create a symlink to the new lib file like so:
ln -s libXpm.so.4 libXpm.so
now as far as your docks go... just do this:
heh... you'd be amazed what you can learn from the included documentation. but most of those docks install their binaries to the /usr/local/bin/ dir, so look in there for them.