Hi, i see you wanna install an sms module on your opencart site to send out messages once the status of an order changes with custom fields and message templates.
I can get this done for you , am a well seasoned developer with over 8yrs experience, worked with opencart a lot. you can be assured a job well done.
So this module you want installed, can you send me its link so i can check it out... or is it custom made?
Would be great to hear from you.
Cheers.