com_registration and regexp

[fbnet]

hello,

i'm getting some problems here: :confused:

i'm trying to permit to my users REGISTER their nickname/username with the following characters:

|, [, ], _, -, and ` but in REGEXP code i get the A-Z, a-z and 0-9 (alphanumeric).

how can i change this to permit this chars ?

is there any component/module/hack/mambot that permit this ?

thanks