Ok, there are two ways they would work with the remote fans:
1. If the remote fans also have pullchains. Then, you can remote the remote receivers and install the receivers for the fan/light "dimmers".
2. If the fan/light "dimmers" are also RF (sounds like they are) you can try setting them to the same frequency as the remotes. You would then NOT install the receivers (remote adaptors) in these fans, as you would be already using the existing receivers.
Ceiling fan remote controls - help and FAQ- Ceiling Fans N More