Default [Q] Custom ROM installation required

Dear All,
I am not a technical expert in this field. I have a Custom ROM, (MT6572 Scatter file) which runs fine on a chinese android phone (similar to samsng S3 mini) . I need to run on a campatible Samsung, huwawei, Qmobile or Gfive phones.
I need some urgent help, or if you can refer someone in Pakistan (or abroad) who can tell me how to fit my custom ROM on the compatible models.
Please help, your experience and expert suggestions can make a difference here
Looking forward to hearing from you