i want it simmilar to dmoz.org
for each category a letterbar with all the links ordered alphabetical in that category

for example:
i have in category 'computers' an letterbar
ABCDEFGHIJKLMNOPQRSTUVWZYZ
now when I click on A, i get all links starting with letter A in category 'computers'

I tried this with a search like:
search.cgi?d=1&query=a&catid=1

but this does not work because a is too short search term
I rebuild index and set index weight on default