Hi,
Sorry if this is already known, but I got my Huawei EC325 working with Reliance NetConnect on my Mac Powerbook, and I didn't use any of these scripts.
There's a driver available, on http://www.hutch.co.th/download/index_en.htm
(The site is a bit slow)
Scroll down a bit, and there's a whole section on Huawei USB. There's also a manual, which is written in Thai, but the screenshots are all in English and I found it very easy to follow.
Enjoy!
Andy