Hi,
I would like to point you to the following forum thread which describes a solution you can take advantage of:
Custom table search.
In case of Kentico CMS 6.0, you can use the same approach. The only difference is that you can use the global event
DocumentEvents.GetContent, as demonstrated here:
Event handlers overview.
In terms of the search results transformation, the
GetSearchValue returns the ID of the custom table record, so to display the text, you would need to create a custom transformation method:
Adding custom functions to transformations.
If you need more information about code customization possibilities in Kentico CMS 6.0, the following blog could give you more information:
Code customization in Kentico CMS 6.
Best regards,
Michal Legen