Source + Database Help

Hi Guys i have 2 question

1.) isit possible to make a new server without deleteing the other database ( what i mean by this is if i have a v17 server and its working but i wana keep tht and want to make v19 with v19 database ofc how can i do this coz the database in mssql is v17 and i want to keep tht and add v19 database if u get what i mean and if u know how to do this please reply thanks.

2.) i try to get a quick 3rd job change in my source and on the tutorial it sed edit WndChangeJobEx.cpp & WndChangeJobEx.h and i cant find those files in my source can some please help me with tht ??

thanks