469016 CRE Loaded PCI B2B v6.4.1a advanced field search

Dear programmer. Have a small job, and need it to be done fast..... I need some mods to the advanced search page and advanced search results page of my CRE Loaded PCI B2B v6.4.1a installation. I want it to include 3 product extra fields in search.... --advanced search form needs input fields (dropdowns) for extra fields and values.. --Result must search with 'and' operator, so must be possible to search products where extra field 1 has value X, and extra field 2 has value Y, and extra field 3 has value Z. Must be able to search on one or multiple extra fields.. Thanks in advance for bidding!