Add new Attribute Option Type

I need to add a new Option Type, same like the TEXT Type (I named it DATE).

What I did...

• Added line to DB products_options_types (products_options_types_id=6, products_options_types_name=Date)
• Searched with Developer Tool Kit all files for "_type_text"
• Wherever "PRODUCTS_OPTIONS_TYPE_TEXT" appeared, I added the same code again (line or block) with "PRODUCTS_OPTIONS_TYPE_DATE".

-> New Option Type shows up in dropdown menu within Option Name Manager
-> New Option Name can be created for this Type

Problems:

• No entry is created in DB products_options_values_to_products_options
• Error while choosing Option Name=Date and Type=Text in Attribute Controler
• Adding DB entry manually no error in Attibute Controller, however Attibute showing up as "Radio" in Product

Any help on this how to get the new Option Type up running?? :wacko: