OK, I'll break the ice here with this offering from the UK government CERT. This should be required reading for anyone interested in the propagation of Trojans and it contains links to some worthwhile advice.
http://www.niscc.gov.uk/niscc/docs/ttea.pdf
The file is quite lengthy so it may take a while to download on a modemĀ :moreevil:
Thanks Eric
and yes a long read.............. :sos: