Looking for similar posts plugin with custom tuning [closed]

I am using Similarity by David Miller; it is nice, but it misses some features.

I would like to:

• Assign more “weight” on some specific posts (specify them by ID is ok)
• Assign more “weight” to most recent posts (the plugin that I am using it prefers many times very old posts based on tag/category than recent)

Do you known if it exists a plugin with these features?

I think http://wordpress.org/extend/plugins/yet-another-related-posts-plugin/ might help..