First off, if this isn't the proper place, MODS please move to where it might belong, but this is pretty much the only forum I check/read everyday.
I stumbled across this by accident by following links after following links and got lucky. I'm a rookie here, aside from flashing ROMS and installing cabs, but I never got Sashimi to work for me and never really tried the UC/storage card file method. This one has worked great for me over the past 3 flashes and is very easy to use. A complete description and instructions are here:
http://forum.xda-developers.com/showthread.php?t=514934
I didn't find it doing a search, so forgive me if it has already been mentioned!