Could anyone who knows post Xoops2 specific information on making modules.

I particularly like to know how the module specific configuration information is specified.
Where to specify admin preferences for a module?

I am assuming the problem was that your firewall blocked cookies coming from XOOPS website. That dont seem like XOOPS problem but your firewalls and your problem. There is one way to get around cookies and thats url rewriting. The php built in session handling can automaticaly switch to url rewriting but it has its own drawbacks. XOOPS uses its own custom session handling which gives most control over sessions although features like url rewriting are not available.

Personaly i allow all cookies. I am not privacy paranoid at all about that.

This problem can be solved with two approaches the way i see it.

First Display the email address in big red letters on the confirmation screen so the user will surely see it mistyped and correct it by going back. This is a quick hack that requires very little change to code. Unfortunaly you still get those people that are internet illiterate and barely use email. My friend who runs and internet company had this problem. There is nothing you can do except to manualy check unactivated accounts and possibly guess what the spelling error is. You can even Im them if they provided that.

Second do not require email activation. Unless your website is designed to be specificaly for annonymity like mp3 downloading (just hypothetical) I dont think that you would want anyone signing up anyway without a valid email account. Some people are that boared and will make fake accounts. The quality of your comunity goes down if people are making bunch of different account for themselves in order to have multiple identities or they might never come to your site again after signing up.

What would be real cool if there was a admin setting like 1-require email activation 2-activate immediatly 3-activate manualy by admins. That requires a bit of a redesign to the system and it would be up to the developers of XOOPS to decide if they want to put effort into that. Most communities would choose you to have a valid email.