IMEI alias on GPRS command parameter???

Hello, is it possible to put an alias on the GPRS command parameter that sends the unit´s IMEI?

I have a test unit that I use to test different trackers of the same model.

I use about 10 commands, and the GPRS command parameter I use is, for example:
**,imei:1234567890,X

Then each time I want to test another tracker, I have to change the IMEI on all the commands.

Is there anything like an alias that repeats the unit´s IMEI typed in it´s properties settings?
something like:
**,imei:%UNITIMEI%,X

Thank you.