SuperOneClick appears to be a no go at this point. Two places I tried to download it provided empty 1K file, second one, from Shortfuse's own site link downloaded a useless 10.1 mb file, and Cnet downloaded a 10.1 mb file with Android.looter.exe or some such virus/trojan in the file.
P.S. Depositfiles.com also has the looter.exe.A virus
following the instructions on that page will get you rooted with cwm on the gs4g. its quick and easy too. took me about 10 min or so to do it. this will also help you get the phone back to normal if you soft brick it, but can still get it into download mode, i know from personal experience