Is the fraction in a separate field? It looks like there are two reasons that BrianO needed to add fractional types of addresses.
1. It looks like there was a need to support house numbers like 100 A1/2 main st. Do you also require support for alpha characters in front of the fraction? If not, the style should handle addresses like 100 1/2 main st.
2. It looks like the reference data that was being used had the fractional house number in a separate field as well which needed to be added to the style OR concatenation to the house number before the locator is built.
Thank you for the latest style sample. It definitely filled in the gaps that the customization white paper fails to cover. My functional style file is attached. It honors fractional address fields as well as separate unit type and unit number fields. I hope folks find it useful if their data is structured in a similar way! Share it far and wide and please, ESRI, polish it and include it as a default in 10.1! I never want to have the need to do this customization again!
You need to place this style file in the locator directory of your ArcGIS install. The default location is:
Our site address data layer uses the following fields:
Address Fractional (i.e. the "A" or "1/2" in "80 A Main St" or "80 1/2 Main St")
Unit Type (i.e. Unit, Ste, #)
The style has not been tested in any other configurations.
EDIT: We are currently on SP1--no testing with SP2 has been done!