They make splitters where you get 2 or more out of 1 4 pin. Hold on, I'll see if I can find one.
Here:
http://www.amazon.com/Computer-Molex-Power-Supply-Splitter/dp/B001PI9AAC
Also, you should just get something like this:
http://www.newegg.com/Product/Product.aspx?Item=N82E16811998065
Here check this one, you can look like a super pimp with your touch screen controlled fan system for $25.
http://www.newegg.com/Product/Product.aspx?Item=N82E16811992005
Touch screen interface
Five fan control through an intuitive interface
Ultra fast selection and response time
Display temperatures in both F and C
Light switch turns off the meter when sleeping
Automatic and manual modes of control
Full compatibility with all types of fans using voltage control
With a maximum of 10 Watts per channel, the Sentry 2 will support almost all high end fans
Tuned accuracy with only a tolerance of one degree
Sound alarm to alert when the temperature is over
Stored settings, the Sentry keeps your settings even after power off
also includes your splitting already done.
I have used one of these in a stealth micro grow before, they are way cool.