Not usealbe unless Multisite ?

Hi

I just tried installing Signup Code on a single WP site.

It broke both the front end and admin

until I ftp ed in to delete it.

I want something like this for a single WP site that allows registration for using the Forum.

A simple captcha form for the main WP registration page would do –

but I am having trouble finding even this.

All the plugins I find by searching are either andtisplog

or else comment form captures.

Can you recommend a main registration form Captcha plugin to stop spammers ?

Thanks – DV