Here's the version I use, think I should share it there since the other thread was closed:
With this version, installation of WADS from SD is faster and supports SDHC as long as they are formatted using FAT (FAT16/FAT32)
QUOTE said:
ADDED FEATURES
**************
+SDHC support (simply modified the code to compile with the last versions of libfat/libogc)
+Faster SDCARD read access (compiled to a patched libfat that uses readahead cache)
Sourcecode included (require a patched libfat to compile though)
Download link