We are discontinuing the manual patch process in favor of nightly builds (which will start in a few weeks) and an improved patch system in 1.2 that will automate the whole thing by grabbing the nightly copies of sw.jar, engine.swc and the language packs. In the are case where other components require an upgrade, you'll be asked to grab a nightly and continue patching from there.
FYI, the 1.1 previews I'm putting out are newer than the patches available here which I've had to manually upload myself.