Deprecated - Documentation

I want my users to have the option to choose a catagory term from the drop down or create one themselves (which would be added to the terms)... is that possible?

thanks!

i spend alot of time @ http://api.drupal.org

in particular http://api.drupal.org/api/5/function.

If i forget a function name there can be alot of searching to find it. Or if i'm looking for somethign i've never used there's pages and pages to hunt through

i wish there was some sort of searching there, much like php.net's function search.

From Wikipedia, it looks that MVC helps long term coding development. I'm not very sure if MVC can make a significant difference with long term web development.

But, when upgrading versions, the users have to wait modules of new version for a long time. It seems often that modules of previous version can not move forward within a short time with the core program. The time lag creates hesitation to use present version and the new version. Isn't it a waste?

My questions are:
1. if Drupal support a MVC framework?
2. from where I can find relative information?

I am unable to find definition of "call_user_func_array" function. I want to change the user registraion form.

I'm developing an extensive fitness training website where clients and users can design their own workouts and schedule by using an integrated training method where they can read, view online videos and download videos to their ipods and other devices and track their progress concurrently. Within the training continuum the client can only progress to the next phase/step when the current phase/step is completed. Nor can the client/user view an higher phase/difficulty of an exercise unless the client/user reaches or passes that phase/difficulty and, of course, is a paid member. However, once completed a phase/step/exercise/schedule can be repeated.

For example, a fitness assessment MUST be done by the client/user to determine the s/he's fitness level and to also figure out which phase/step s/he should begin and what necessary corrective strategies s/he need to undertake to correct any such muscle imbalances.

I converted to Drupal because of its robust strength and functionality. My problem is I've hit a wall with multipage forms. It's very difficult do to in HTML as you can see from this example in Step 1: Warm-Up (General) - Treadmill Walking (old site). Drupal multipage form seems promising, except:.....

I have built a form for a standard page node, using PHP filtering. I really like the ease that I could do it, but how can I collect the data being submitted? Ideally it would be thrown in the database, but I cannot seem to find the documentation for that. I really don't want to build a whole module for this, as doing so would take to long. If adding to the db is not possible (via The Drupal Way), may I specify an email address for the results to be sent? I am using 5.1.