Hey guys. Is it a good idea to cool my blades with standart fan like this one http://www.mh-china.com/UploadFile/2006112010464134010.jpg ? i got 5 blades on hand

Another newbie question:

in the field "user:pass" you should enter your login details to slush's pool? Like that "sampleuser:password123,sampleuser:password123" ? Not workers' details?