Hi tanread,
there is something on the Russian forum, and a very useful link for these resources is this page:
http://translate.googleusercontent.com/translate_c?hl=en&rurl=translate.google.com&sl=ru& tl=en&u=http://bivsumy.narod.ru/pocketbook_602_pro/podstroika/&usg=ALkJrhgd_bHQCetmn-52CcxcS-K8__0_rw
These themes are very nice in that they also introduce and use additional applications, including one (history.app) to modify the list of last open books - at least this is the theory, I haven't tried it out yet.
The versions for 60X models are easier to donwload, but to get those by EdHell for the 90X models it took me ages, so I am uploading them here. The attached zip file contains the following:
Themes_src.7z:
Beauty''10.7z:
note''10+history.7z:
britanica''10+history.7z:
The first file contains the various sources, while the other three contain the compiled themes and the applications.
I am working on adapting the themes for the 360, but it does take time and patience, so if you get anything done, please do update us
EDIT: it must be me, however none of the above work on mty PB903
