Hi guys,
I would like to auto login a user after they have successfully registered (extended profiles module) to a site with their inputted login details.
The reason for this is that the next step after registration will be to forward the user to the subscription (module) page. Where they will be requested to pay in order to complete the subscription process. So ofcourse the user will need to be logged in.

Can anyone advise (against dangers) or done this already?

There is an autologon hack.

The problem with an autologon is that if they are using a public computer then it may not be 'them' that comes back.

Supposed to be in 2.3

What's New for Users
-----------------------------------
Some of the new features that might interest users:
- Default character set encoding has been changed to UTF-8;
- Enabled "auto login" or "remember me";
- CAPTCHA is enabled for registration and comment system;
- Block clone enabled so that webmasters have more flexibility;
- XOOPS editor package is provided and most visual editors are avilable, e.g. FCKeditor, TinyMCE, etc.;
- Side-wide editor;
- Mask is added for start page;
- Implemented new installer with user experience improvement experiments;
- Permissions for access to user profile page is configurable.