Problems with using Customize table schema

hi, The only thing I want to do is to used my customize table schema of my own. I am confused whether I used the sql.conf or the perl module.Pleaseadvice which i should used. And if i used the perl module, please tell me how should I write the connection parameters and the sql queries for connecting to the Ms Sql. And if i used the sql.conf please tell me how to used my own customized table which contain only username and password. With Regards Elangbam Johnson