PRS650
For those that only want to access userStyle.css without other goodies and About screen hack from the russified firmware:
Required files:
cramfsck.exe and mkcramfs.exe
original firmware with porkupan's flash too
md5sum.exe
Extract img to opt directory
cramfsck.exe -x opt -d opt.dt new_opt.650.img
Locate: C:\cramfs\opt\opt\sony\ebook\application\FskDocume ntViewerAdobe.so, at offset 6CC6B7
hex edit and change it from res:///adobe/pxf to res:///Data/epub, same byte size
Compile it back (delete the old one)
mkcramfs.exe -D opt.dt opt new_opt.650.img
Make a md5
md5sum.exe new_opt.650.img > new_opt.650.md5
Copy both .img and .md5 back into PRS650.Flash.Package.orig\test-flash
and flash.
Do the userStyle.css thing from previous few pages.