How to make avatar mandatory in New user registration

[RaceMediaGroup]

How to make the avatar mandatory in New user registration by selecting from avatar options from my server?

Please help

[Bubble #5]

The easiest way is to have a default forum avatar. There should be a hack for this.

[Kevlar21]

I created an image and replaced "unknown.gif" in images/misc folder

[RaceMediaGroup]

I got a download for this but I am Stuck. the link for this thread is
http://www.vbteam.info/req-addons-and-template-modifications/50908-req-specify-avatar-on-registration.html#post263977

I do not see this in my register template:
<if condition="$show['regimagecheck']">
<fieldset class="fieldset">

to post the remaining code...

Please help!