Questions about : PROFIL FIELD MANAGER

Hello everybody, i've just got few questions about PROFIL FIELD MANAGER.

1. When i add a new field, what's the difference between Match Type & Match Field ? What are they? How use it ?

2. What's Search type ?

3. I have developped a search engine with 2 drop-down box. When i select one value in the first, the second has populate in function of the first one... I integrate it in search.php... But i would like integrate it in join form ... But i can't create it with PROFIL FIELD MANAGER because i use database, php and ajax... Do you have another solution ?

Thanks very much for your help.