Here goes something simple to get you started (completely untested)
#!/bin/sh
#MyVeryBestPrinter is your printer name
# This is where .doc files are
DOC_DIR="/path/to/whereever"
for FILE in $DOC_DIR/*.doc
do
lp -d "MyVeryBestPrinter" $FILE
rm -f $FILE
done
###
Now I am not sure CUPS will be able to deal with .doc files so you might have to install a filter of some sort for that (antiword is a good candidate) or convert them to PDF (CUPS can deal with PDF,PS...).
HTH