A very detailed instruction can be found at the
Icarus website. I'm especially recommending reading this
document.
Short instruction:
Internal dictionary viewer is working only with Stardict files.
Every Stardict dictionary consists at least of 3 files:
*.idx.gz
*.ifo
*.dict.gz
Foldername should be Dict (“/mnt/sdcard/Dict”).
I think Dicts can be placed in subfolder, but that is for you to test:
/mnt/sdcard/Dict/1/1.idx.gz
/mnt/sdcard/Dict/1/1.ifo
/mnt/sdcard/Dict/1/1.dict.gz
If Dictionary is not recognized, try to unzip it: 1.idx.gz -> 1.idx & 1.dict.gz -> 1.dict.
Attention: The dict-viewer has problems with html-formated dics, showing the html tags too. Thats probably one more reason to use other dictionary apps (fora etc.) and alternativ ebook reader programs (AlReader, Coolreader etc.).