excuse my ignorance, but where would I get drivers for this?

I got some drivers, and took them from my PC to the mac, (They were .SIT) and after i converted them to mac format (with the PC conversion tool) to stuffit format, the stuffit program said they were corrupt or they were made with a newer version of stuffit.

So where would I get a newer version of stuffit? I've googled around, but they all seem new versions

When i get the drivers, where do they go?

(Sorry, I'm a complete mac noob, but slowly feeling my way around)

I'm thinking about purchasing a mac SCSI External CD drive, i'm guessing that is much more likely to work?

Much thanks.

Mike