Command option to ignore errors during drush dl Just trying to start creating prefab lists (of modules etc.) and building my site development environment at the moment. I'm trying to call sudo drush dl (list of modules) and it works until it can't find one and stops the entire process. 

Is there a switch I can use to get drush to continue through the list and perhaps even list the terms which failed to download (not important). I've just seen a sentence alluding to creating your own drush commands, but figured I'd check the community first as that could take a big chunk of scarce time!

Thank you for contributing to this great site, hopefully one day I can return the favour!
Sorry... Found out how to work around such a situation:

By skipping the explicit download function dl and just using the enable encommand 

cd module path

drush en file list  

you get an automatic download option, which I think by adding -y you can automatically answer yes to all pompts. It's just a problem that sometimes the module names won't always match the package name.