I think that the path of the least resistance is to make a pdf and embed the fonts in it. Such pdf should be readable on Sony Reader without ANY modidication.
Please download OpenOffice.org
- start a new document
- set page size to 90mm x 120mm
- set page margins to 2mm
- insert a few pages of armenian text. I recommend font size 12 points, but feel free to include several font sizes
- export the resulting file as pdf
- post it here so somebody with Sony Reader or Amazon
Kindle can try to view it.