Inserting a record for each unique ID

Hey guys,

I have a pretty simple table used to control user options, with the following columns:

UserID, OptionType, OptionKey, OptionValue

There can be multiple records for each UserID, but each UserID won't necessarily have the same number of records, nor the same values.

What I need to do is make sure each UserID has the following record set against it:

OptionType = 5, OptionKey =2, OptionValue = 1

What's the easiest way to determine whether those values exist for each UserID, then insert them if they don't exist?

Thanks in advance