It is much easier to install the application from the application manager directly.

http://maemo.org/downloads/product/OS2008/stardict/

Instructions on where to copy the dictionaries (oxford etc) are also described in the above web page.

PS: if you are look for the newer 3.00, I would recommend to stick with the proven 2.48 (above). The 3.00 has 'hanging' problem with dictionaries caching, and it is not hildonized.