[Typo3] add file to new extension, how?

[Erwin Wondergem]

Hi,

just created my first extension. I need to add a php-file with some 
classes to this extension, but can't find any way how to do this.
By ftp the folder /typo3conf/ext/myextension/ is not writable (don't got 
permissions...) and i don't have any shell access to my web account.
Is there a way to accomplish this by use of the extension kickstarter?

Thanks in advance, Erwin

-- 
Erwin Wondergem [erwin at fuelle.nl]