Change Default Hard Drive?

Hi I have  a 64 gb ssd as my boot drive and that pretty much all i want it for, however everytime i try to download anything it automatically downloads to my ssd and not my 500gb western deigital veloci raptor. Some larger games on steam will let me choose which drive to put it on, but smaller files like  indie games or anything else it doesn't give me a choice. Is there a way to set my 500 gb as my "main" drive?

thanks in advance!


i think you can do it in your browser settings

ok ill have a look see = )