Drag n Drop multiple file upload

This is possible using the Tools>Attachments button top right and will save a lot of hassle.  Of course upload sped is a function of the slowest link between your PC and the server but just leave it running.

Internet Explorer is not fully html5 compatible and hence this facility will not work when using it as your browser:    http://tweaks.com/windows/48223/spell-check-addon-for-internet-explorer-9/
If you do try it and it asks to load GOOGLE Gears - don't bother - this tool was withdrawn from the market by GOOGLE and is not longer supported.:

I recommend you install Motzilla FIrefox or Google Chrome etc