what software specifically? have u tried winrar to open it? or you have downloaded it and the file is corrupt. maybe try downlaoding again.. or maybe the link is removed because software is out-of-date.

bdw, if you are trying to upgrade to 2.0.+, you dont need software anymore. just download the custom applei firmware.
just DFU and restore it with your iphone and your done in 5 minutes.

anyway, if you want the pwnage tool, you can downlod it anywhere. just search in google.

anyway, can i ask your username in the site? :P
just dropby again then i will assist you personally. ^^

team applei.ph < www.applei.ph >
For your iphone needs! :P