One thing you might be able to do is use the ATmega32 as a slave controller and run a serial interface from the EZ-bv4 to it. The EZ-Bv4 would become the host and the ATmega32 would be the slave.
The idea would be to program the ATmega32 one last time to accept serial commands to activate all your built sequences that you've programmed over the years. The EZ-Bv4 would have to be mounted on the RoboPhilo and interfaced to the ATmega32 with VCC, RX, TX, GND. The EZ-Bv4 would need either above 4.5V to it's VIN line or 3.3V to it's VCC line. No need for a level-shifter on the RX and TX lines as the EZ-Bv4 digital pins are 5V tolerant and the ATmega32 can read 3.3V logic.
Although this is possible, practically speaking it would probably make more sense to just use the EZ-bv4 to takeover as the entire controller. This would simplify things from the hardware side, except possibly figuring out the battery voltage versus the max voltage rating of the servos. The EZ-Bv4 takes the input voltage and applies it to the servos (7.4V input = 7.4V on the servo power line). Using the EZ-Bv4 and the ease of ARC will likely allow you to replicate all the sequences you've made (and others) in a matter of an hour or two.
One thing you might be able to do is use the ATmega32 as a slave controller and run a serial interface from the EZ-bv4 to it. The EZ-Bv4 would become the host and the ATmega32 would be the slave.
The idea would be to program the ATmega32 one last time to accept serial commands to activate all your built sequences that you've programmed over the years. The EZ-Bv4 would have to be mounted on the RoboPhilo and interfaced to the ATmega32 with VCC, RX, TX, GND. The EZ-Bv4 would need either above 4.5V to it's VIN line or 3.3V to it's VCC line. No need for a level-shifter on the RX and TX lines as the EZ-Bv4 digital pins are 5V tolerant and the ATmega32 can read 3.3V logic.
Although this is possible, practically speaking it would probably make more sense to just use the EZ-bv4 to takeover as the entire controller. This would simplify things from the hardware side, except possibly figuring out the battery voltage versus the max voltage rating of the servos. The EZ-Bv4 takes the input voltage and applies it to the servos (7.4V input = 7.4V on the servo power line). Using the EZ-Bv4 and the ease of ARC will likely allow you to replicate all the sequences you've made (and others) in a matter of an hour or two.