You only need to do 3 regarding requests.

#1: figure out which section you think your query is located and go through the pages.
This shouldn't be a problem because the only section with the most pages is Gaki no Tsukai, which only has 10 pages and another batch of separate subcategories to further help you out

#2: 'search' button.
There is a search button located on the first link at the top right below the header

#3: Please mark your request as "Filled" once it has been filled.
This would help a lot with the organization and intuitiveness of the Request board. To mark a request as filled click "Edit Post" and change the Prefix to "Filled."

(Edited by JordansOcarina; 4.19.2013)