Normally It cannot be enabled due to error 1053. But I did not try it when I've upgraded from older version.
It's not dead. Look into first post. There must be a download link hidden by first of the spoilers. The download link is not down (at least for now, but there's a chance to be removed due to some copyright issues. I hope it won't be removed soon since I don't think I can reupload it.)
"AntiWPA" and "WPA Kill" are different things. Anti WPA is dll that hooks system without modificaions (useless for this conversion). "WPA Kill" directly patch winlogon.exe
Depends. While AntiWPA 3 did indeed in-memory patching, the older AntiWPA 2 still hard-patched winlogon.exe. Fun fact: AntiWPA 2.0.1 internal executable file name is WPA_Kill.exe. Note: I even found the source code archive of AntiWPA 2.0.1 (antiwpa-2.0.1-winxp-2k3src.zip) which is still in my vast archive directories.