Customize the customer self-registration

[Asvinours]

Hi,
I'm trying to customize the customer self-registration. I tried to link the customer self-registration and the agent form for customer registration, and use the option we can specify in the config.pm. Then, the mandatory fields appear automatically in the customer interface.
But I don't know the architecture of OTRS, and I don't find how to do this. Is that possible ?
So, I tried to add some field, like it's showed in the doc. But when the registration failed, the first fields keep their value, and the new field didn't. Is there another option to specify to do that?

The other auestion I have is, when we link company and customers, they can only post tickets in the company section. Every ticket created is associated to the company. Is there a way to switch from one to another ? Like "New company ticket" and another link "New personnal Ticket".

I hope someone can understand me.
Thank you in advance.

[jeffman1]

I would wait for cythias. But if you look at the name of the file in the address bar and look for it in otrs folder in program files you should be able to edit it. Perl relys on modules a lot it seems and I wish the same thing could be done in php(much easier to code/decipher). Perl has some regex expressions that can become very difficult.