I believe you'll find all you need right here:
http://tengwar.art.pl/tengwar/ktt/en/download.phpIt would be amazing to have a Quenya/Cirth table for scim so as to allow easy switching between the two main styles of writing. Similar in nature to the setup for Hiragana/Katakana in either scim-tables or anthy.
But if you just want to direct me to a place wherein I can learn to do so myself, that'd also be cool.