Well, your made a thread about using the Altima fans and to our understanding (people who are trying to give you advice), non of us have ever run them with the stock clutch fan in place. I highly doubt you can fit both of them at the same time.
There is no reason to "upgrade" your clutch fan to a e-fan setup, as there is no real life advantage. We can talk about freeing up a few ponies, but your ass dyno will not feel the difference between 150whp and 155whp. Plus e-fan does not really cool better/worse than a clutch fan, unless you get one that out-flow the other along with proper shrouding.
Again, stock ecu trigger the fans when AC is on and/or when coolant overheats. Your engine will run at a much higher temp.
This is what the stock fuse/relay box looks like, you can lift the trays for the relays and fuses. Then you will see how the stock unit is wired, and you can use junkyard or custom parts to make your stuff stock-ish. However, there is only one extra relay holder in the box. I had the luck to find another tray where it is holding relays only to hold the 2 extra relays.
And if you know how a relay works, you will be able to find the ecu trigger signal. Then it is a matter of tapping the wire and just it for other relays to trigger your fan.