hello,
there is a possibility in msn messenger you are able to scan a file to get from a buddy…
question: which *.exe file should I pick, so Avast scans the received files? – thank you
Instant Messaging module keeps an eye on MSN Messenger 
I know,…but in MSN you are able to select your antivirussystem so it scans files you receive,… i guess this option is kinda useless in msn if you have avast
Yeah well if you don’t have IM module installed than you can use ashQuick.exe for this task (for selectable AV in MSN).