public String getConfigPath(String filename) {
		if (eng.isApplet()) return null;
		File jgamedir;
		try {
			jgamedir = new File(System.getProperty("user.home"), ".jgame");
		} catch (Exception e) {
			// probably AccessControlException of unsigned webstart
			return null;
		}
		if (!jgamedir.exists()) {
			// try to create ".jgame"
			if (!jgamedir.mkdir()) {
				// fail
				return null;
			}
		}
		if (!jgamedir.isDirectory()) return null;
		File file = new File(jgamedir,filename);
		// try to create file if it didn't exist
		try {
			file.createNewFile();
		} catch (IOException e) {
			return null;
		}
		if (!file.canRead()) return null;
		if (!file.canWrite()) return null;
		try {
			return file.getCanonicalPath();
		} catch (IOException e) {
			return null;
		}
	}