Creating unique IDs for file geodatabase using ArcGIS for Desktop?

I use ArcEditor licence level, ArcGIS 10.0 version, and we're talking about a file geodatabase.

I have several feature classes (electric energy domain) and I want to connect them using relationship classes, so I want to use their ID's as foreign keys.

I want to automatically create a significant unique ID for each feature. It'a a text type ID, which would be composed of two letters and several numbers (ex. CH00123, CH00124). The ID would give me three info : what type of feature we're talking about (channel- CH), on which street it is (00), and it's unique code (123). I don't want to type this code for every feature I create, I need something to automatically assign an ID to each feature.

I am not sure how to handle this situation. Do I need to use a data integration software? an engine to generate my special ID's?