But, after some time, I tried to find some better way to do this...
After some reading, I found, and off course, successfully tried this two ways of doing this:
1) EM grid control
In a book "Oracle Enterprise grid control 10g handbook" , in chapter 14 "Database Management in Grid Control", Page 447, we have workshop "run a SQL Script Against Multiple databases", where, in details, is explained how to achieve what we wanted.
preview: Oracle Enterprise grid control 10g handbook
2) Toad ScriptManager
I will not copy/paste someone else work :-).. Here is a link and detail explanation:
Toad metod 1
3) Toad Project Manager
And, my favorite, fastest and most elegant way:
Toad metod 2
So much for this time!