I stand corrected on the php part. About mysql you are also right, those are the correct params.

The minimum length of words to be indexed is defined by the ft_min_word_len system variables. The default minimum value is four characters.

ft_min_word_len
Command Line Format --ft_min_word_len=#
Config File Format ft_min_word_len
Option Sets Variable Yes, ft_min_word_len
Variable Name ft_min_word_len
Value Set
Type numeric
Default 4
Min Value 1

If you change this value, you must rebuild FULLTEXT indexes. For example, if you want three-character words to be searchable, you need to edit my.cnf and set the ft_min_word_len variable by putting the following lines in an option file:

[mysqld]
ft_min_word_len=3

Then restart the server and rebuild your FULLTEXT indexes.

Repgeek is not currently running under fulltext, hence not beeing able to process boolean search. This needs to be fixed first in admincp.

Then you need to change the mysql setting. If the server is dedicated this should be no problem, and a restart only takes a few minutes.

However, if the forum recides at a webhotel (like my forum) and the webhotel has fixed settings this is not possible. Search will always be what mysql wants it to be and in most cases this means 4 caracters.

Apart from all this: As long as the crew donīt want this, it will definately not happen.