cd src
pdflatex module-6-slides.tex 
until you are happy with the results

then 
./make-handout.pl
pdflatex module-6-handout.tex

if you're editing and add any new slides that should be 
omitted from the handouts you can use the \omitfromhandout 
command. As a general rule, slides include solutions to the exercises 
but the handouts don't.

Also, regarding handouts and slides on the wiki:

Just to let you know, the way I did this for the last course was to
create a zip file containing the module-X-handout.pdf and the hands-on
directory for each module and upload that zip to the wiki (rather than
linking straight through to /sale/talks/...).  I've done the same this
time for my modules 7 and 8, and I've checked in the corresponding Ant
build files in your modules 5 and 6 that will build the equivalent zip
files, so when you've finished your slides you can put them on the wiki
in the same format.