Creating a custom Search

Hi,

I have been working long and hard on a module that lists hostorical sites that users can search and work with. I have looked at Drupal search system but it is not as detailed as what I need. I have made a basic search that uses mysql's FULLTEXT feature. This works fine.

What I need to do now is create an advanced search, very similar to the one that is in the default search of drupal. My problem is this. How do I pass multiple parameters via the address bar and be able to pick them up when they are sent through to a receiving function? From what I understand it is preffered not to use _GET but to rather use _POST. Not too sure.

I have had a look at the search module itself but it is pretty complex. Hoping there is a tutorial around that someone has made or knows of that I can have a look at.

Thanks in advance,
Davin