Photoshop (.dds) Plug In Problem

Hello,

 

I have PhotoShop v5.5 and would like to use S3's .dds file format with it. I got the dss.8bi file from S3 (and I think there's one with the original PS CD too), placed it in the C:\Program Files\Adobe\...\Plug Ins\ directory but the .dds format doesn't come up for either reading/writing? I also tried in the "PhotoShop Only" and "ImageReady Only" plug in areas too. The program help and Adobe web support just says to put it there and it will find it but it doesn't work?

 

Any help will be apprecited.

 

I didn't find the right solution from the Internet.

 

References:

 

Thank you.