You can use @dblookup as the VALUE for a computed field, or a DEFAULT value for editable field by putting the corresponding @dblookup formual in each field. Be aware, multiple @dblookups on the same form can make it very slow.
When I need to do this, I usually make a view with all of my values, do ONE @dblookup, then parse to other field values from there. This is actually much more efficient to do using LotusScript though. If you want some sample code I can send it to you.