hello,

for anyone who has ever this problem, it is even easier,

look in the template file user_signup.html

for the part[quote]
<%--
The following option is used to allow users to choose a different template set
when they sign up.

You can specify alternate template sets that a user may choose by simply
cutting and pasting the HTML below. If a user has an alternate template set
specified, whenever they use the forum they will see the template set of their
choice. This makes using an interface with multiple languages very easy - one
template set for English users, one for French users, one for German users,
etc.

For example, if you were to add two new template sets called "french" and
"german", in addition to "default", you might do something like this:
<option value="default"<%if user_template eq default%> selected<%endif%>>English</option>
<option value="francais"<%if user_template eq new_template_set%> selected<%endif%>>Fran&ccedil;ais</option>
<option value="deutsche"<%if user_template eq deutsche%> selected<%endif%>>Deutsche</option>

Also remember to change the same select box in user_profile_display.html.
--%>
[/quote]

So, this explains everything. And, if you don't want to let the person the choice, you can make it an hidden input.

Paul