I found this post while googling a bit... and I'm reporting the just the essentials, for further reference.
<configuration>
...
<system.web>
...
<httpRuntime
executionTimeout="240"
maxRequestLength="16384"
useFullyQualifiedRedirectUrl="false"
minFreeThreads="8"
minLocalRequestFreeThreads="4"
appRequestQueueLimit="100"
enableVersionHeader="true" />
<system.web>
</configuration>
This will allow for the upload of a 16mb content.