[chimera-dev] Extensions - problem with paths

Hello, I'm trying to write my own Chimera extension. First of all, I'd like to thank you for providing so much useful information and so many examples on your site, it's extremely helpful. But there's one problem that might be a serious issue once I try to share this extension with other people. I don't know why, every time I need the extension to write a file, I have to determine an exact path to the localisation where I want the file to be placed. Otherwise it always creates the file on the desktop (I use Windows 7). Is there any way to make Chimera create new files in the extension's directory without giving it an accurate path? Thank you in advance for your help, Mateusz