Alright, I rooted my Nexus S 4G this guide. My phone was running 2.3.5 but I figured that these steps in Terminal wouldn't really change. When I flashed the "recovery-clockwork-188.8.131.52-crespo.img" it didn't install properly (I assume because it was out of date/wrong version) Anyway, I flashed this instead with no problems. In my euphoria over solving my clockwork problem, I forgot to flash the "su-184.108.40.206-ef-signed.zip" and flashed the current version of MIUI. I am now stuck in a bootloop and I cannot enter recovery by using power+volume. I cannot turn the phone off. I can load the bootloader screen using Terminal while I plug it into my computer, but I don't know what to flash to fix the phone, and start over/end up with a Nexus running MIUI.