Table interface modify_class in 2004s

Hello,

I had migrated from 3.1 to 7.0 mu BI. My problem is that in templates of 3.1 I use modify_class for change colors anf formats of my templates with param modify_class and abap classes.

I have read that in new version its not possible. How can I get the same funcionality in 7.0 version?

Could I lost all changes of my templates in 3.x?

Thanks