Dark Alex's new firmware has finally hit the web, bringing it inline with Sony's version 3.80 firmware. One lovely new feature under the hood though is the ability to upgrade your firmware without having to trek through websites, copy it to your card and the rest of the monotonous process.
HEN core: user mode can load now signchecked files from flash. recovery: flash1 format will create flash1 directories after format. This could fix some flash1 issues with the previous versions. Network update from dark-alex.org page. By default is enabled. You can turn it off in recovery (when off, network update will download sony updates as usual). Nids resolver for various kernel libraries.
Instructions included in the rar file.
All in english.
Note: This has been tested and working on my psp and it is my current firmware.
You can play iso's from the mem stick by sticking them in the "ISO" folder in the root of the mem stick. Also you can play PSX games if you download the homebrew kernal.