can somebody help me acheive this?

I need to output pdf files to a shared folder on the webserver.

since i have to schedule a lot of reports, i dont want to be typing in userid and password while scheduling every report.
I want to be able to choose a database field for userid and another for password.

is this possible, i assume so because of the fact that these fields have an option of selecting from query.

when i do this, i get an error about encription.

thanx.