having trouble installing the correct drive for a d link notebook adapter

the model number is dfe-690txd

i am running osx.4.8 on my old pismo and the driver disk did not have what i needed, so i downloaded the most current driver from thier site (although their newest drive sais 10.2-10.3 so i'm worried).

now i have a file called dfe690TXD_macx_091603.sit that i cannot open.

I accidentaly (dont ask tho, dont remember >_<) set the default application to open as disk utility (i know, stupid)

so now idk how to open this file and install the file

any help on how to do this and fix the problem i caused before?

thanx alot
~Joe

You need StuffIt Expander. If you're running Tiger you probably have it if you upgraded from a previous version of OS X. If not, you can download it from www.stuffit.com and you should be able to extract that file.