Inside the LoadRelatedRecords routine load the record you want.
Then push the fields into the session queue. You can do just the fields you want, or the whole record.
For example;
usr:id = 5
Get(User,usr:key)
p_web.FileToSessionQueue(User)
Then on the form just use the usr:name field as a normal form field. I guess you'd probably make this a Display field, because obviously editing it won't do anything in this situation.
Cheers
Bruce