Dara's post dated Fri Jun 16, 2006 9:53 am HERE should help, it gives Cyrillic & 'Roman' versions of Bulgarian words, as well as the Bulgarian Alphabet & pronunciation.
I picked up a great little book at the airport waterstones, which had all the phrases to use in bulgaria.
I found many bulgarians spoke english also even the supermarket cashiers but when you do meet someone who cant speak english then it becomes difficult.
If you go to a book shop in Bulgaria and pick up the small English Bulgarian phrase book, it is bright yellow with a black scorpion on it.
This is a very good book and writes the words exactly how you would pronnouce them.