First Post: A little question on saving files in diff. paths

[doerteDev]

Hi. I am currently on a magazine project using bolt/bolt as an administration panel for a symfony2 app. Since in my FrontendBundle there are symfony commands to generate thumbs from the first pages of PDF files, which have their content Type integrated into Bolt, I wonder how to tell the bolt admin to save issue.file (the pdf) in a completely different directory (from %root%: ../src/Application/FrontendBundle/Resources/public/pdf/magazine/issues ) which itself gets symlinked into ../web/bundles/applicationfrontendbundle/pdf...
I have similar issues with images, but I'll stick with the PDFs for now.
Since there is no freenode chat available for bolt/bolt (would love to see one), I just opened this issue. If there is currently no method for this, I would love to see some feedback from some more symfony/silex-flavoured devs than I am one (yet).

Thanks in advance guys.