Ha ,so it should be /dev_flash/ otherwise it will give you some nasty bugs and you have to write a code to map arround.
Also i want to say that i for my self have learned will writing and developing PS3 ACID Tool for PC, that i have released, that its better to not combine to many apps. I've got some nasty bugs then more apps and code i have written and included.
Google teached me to split up the apps and embend them into the main app so that one .bat and .exe was called after another. And magically most bugs disappeared without the need to code around.