There's are a lot of way of doing it, but Babak's got a good plan there. For some reason, the manual that he found for APP MAP leaves out the UNC drive naming part ( for Windows folks):
Here's a link to follow up on Babak's excellent suggestion:
But -you may need a drive that is NOT on your WFRS (WebFOCUS Reporting Server). So - a UNC name might be good so you don't have to map a drive. Remember if you're running on Windows, you may need to tweak your WFRS Service to run under a user ID that's allowed to reach a network shared drive...
Scroll down for the blurb about UNC names if you're using Windows.
app map test \\mynode\myshare\accnting for example...