My provider is Boost Mobile if that's important.
The first step I took was to unlock the bootloader, which was successful (I did use the HTCDev website, submit my identifier token, and it definitely worked).
The real trouble was when I tried flashing my recovery and boot .img's using the files in this link (for the HTC One S): ((I can't post links as a new user, but I tried acquiring my .img's from the CyanogenMod wiki, in the guide for the HTC One S, which was probably the root of this problem)
Terrible mistake, I know. I think my phone is bricked, but I'm not 100% sure because this is the first time I've tampered with any phone on this level. The only comparable mistake was when I accidentally formatted my hard drive when I tried installing Arch on my desktop, two years ago.
Right now, my phone won't start properly. When I do a normal bootup, by simply holding down the power button, I get treated to the HTC logo followed by a blank blackish-grey screen. I have to remove the battery to exit it. I can access fastboot, but when I attempt to access recovery I get taken to a perpetual load screen with an HTC logo and "Entering recovery mode..." on top of it. I have to remove my battery at this point because it never goes beyond that screen.
The other trouble is that while I seem to be able to access my phone through a USB cable, and apparently detect it using the "fastboot devices" command, the device itself doesn't seem to show up on Windows (as C525c, like it did before). I'm not sure if this has to do with me screwing up my boot and recovery .img's or my USB drivers.