Electric trunk pop w/o an alarm is easy. Ground the solenoid and run the push button switch to 12 volts. I recommend SPAL's 35 Lb pull solenoid that they use for thier popper kit. The DEI 522T may also work. Most others will NOT work. I have tried the el cheapos and they don't have the guts and I install these things often.

If you have an alarm with a extra channel, you can add eltronic trunk pop off that channel and also use a switch. But for security purposes I would not add the switch.
It is simple. Find the alarms extra channel. It should be a negative 250mA output. Meaning a low amperage - 12V out. Do not connect this to the solenoid! Use a relay. Any standar bosch 5 or 4 pole relay should work. These can be found in fog light kits or at Stereo shops or auto part stores. It has 4 or sometimes a 5th center pole. We will only need the outer poles/ tabs
Connect +12 Volts to the 87 and 86 numbered poles. The numbers are next to ther tabs. Take the alarms -12 Volts 250mA auxiliary channel output and connect it to the #85 pole/tab. Now connect a wire to the #30 pole/tab and run it to the solenoid. When the remote channel is used this will provide + 12 volts to the solenoid.
Please see pic of relay

Next is mounting of solenoid.

Mount the solenoid close to the trunk release lever. In this case I mounted it in the trunk lid. There was not enough space to mount in in the lower trunk lock area. I connected my cable to the lever for the emergency trunck relaese that is located in the trunk lid. The solenoid only has a 1 inch throw, which is more that a cheap solenoid which may have only a 1/2 to 5/8 throw. So it allows for a lil slop in the cable. Always try to keep the cable straigh t and inline with the trunk cables release so it does not bind at either end.

Before pic

After pic. Showing solenoid and cable. Allow extra cable for adjustment. Don't cut anything yet!

Close up of connection of cable.