Alternative methods: Here
Mirror here

OR
Just run mcz's mcconvert (very easy)
copy to SD or CF memory, install, reboot ... it's English

First follow part #1 OR install the Language switcher application

Install the Unicode font with Eng & Japanese support

If you're using a SL-C750 or SL-C760, you'll need to install the Terminal application found on the Zaurus CD-ROM

next you can put Handcom WORD back into English mirror if down...

optional: speed up the SL-C700 (personally I haven't tryed this)

other methods: some links to other "how-to" guides> (personally I haven't tryed all of these)