[Khledar]

Ye, I guess i didn't see what you were planning to accomplish, if it isn't connected it won't restrict it. Depending on how close it is the fan may "miss" more than it hits - If you setup an axial fan I'm sure you can judge how best to space the two - although inside a case, you're prolly close enough :P

It's hard to suggest something without knowing your case setup, but it seems like you have a couple good ideas, as you mentioned either ducting air flow towards the rad, or ducting rad intake towards a fan.