Database application question

I'm having problems figuring out how to code a piece of an application. I am writing a front end to a database that keeps track of our servers. For each server, there are 1 to many processors, dimms, nics, etc. Because of this, each of these components is in it's own database with a server id field that links it to the server record. So when adding a new server, I have a standard form to input the data for each field or choose the data from a drop down list. In the case of these other components, I want to have an add button to add so that I can add multiple instances of each component. The problem is, how do I go to another form to choose the component, and then have that value added back to the already partially entered form. Thanks in advance, Troy Moreland