Module development and code questions

Is there a module for or one that can be modified easily to have a user aggreement page show? I need the site users to accept the terms of usage before the registration continues.

I have some questions regarding the poormanscron module. I use it on several sites and there's no 4.5 version, yet. I supplied a patch (http://drupal.org/node/11385) and asked if I may apply it, but received no answer, yet.

This is a great module! Just what I was looking for to segregate contect based on user roles. However, there's one funny thing going on, and I'm not sure if it falls into the "feature" or "bug" category...

If a user has multiple roles, and a forum topic has access permissions for each of those roles, the forum topics are duplicated one time for each role for that user.

For example, if a user is set up with the following three roles:
1) authenticated user
2) contributor
3) developer

Although originally working just fine, I am now getting these errors when testing using paypal.module using IPN to process payments:

warning: Cannot use a scalar value as an array in /home/nickfeld/techstockinsights.com.nbsweb.net/html/newscenter/modules/ecommerce/cart/cart.module on line 295.

warning: Cannot use a scalar value as an array in /home/nickfeld/techstockinsights.com.nbsweb.net/html/newscenter/modules/ecommerce/store/store.module on line 465.

warning: Cannot use a scalar value as an array in /home/nickfeld/techstockinsights.com.nbsweb.net/html/newscenter/modules/ecommerce/store/store.module on line 508.

warning: Cannot use a scalar value as an array in /home/nickfeld/techstockinsights.com.nbsweb.net/html/newscenter/modules/ecommerce/store/store.module on line 513.

warning: Cannot use a scalar value as an array in /home/nickfeld/techstockinsights.com.nbsweb.net/html/newscenter/modules/ecommerce/store/store.module on line 518.

warning: Cannot use a scalar value as an array in /home/nickfeld/techstockinsights.com.nbsweb.net/html/newscenter/modules/ecommerce/store/store.module on line 521.

warning: Invalid argument supplied for foreach() in /home/nickfeld/techstockinsights.com.nbsweb.net/html/newscenter/modules/ecommerce/store/store.module on line 523.

warning: Bad arguments to implode() in /home/nickfeld/techstockinsights.com.nbsweb.net/html/newscenter/modules/ecommerce/store/store.module on line 531.

In sending an email to the mailhandler, what commands, e.g., promote=1, would be included in the email to denote what role can access the content of the node being handled?

I am considering writing some code that uses the Curl library. I know that some web hosts do not have curl installed, and my code would break on such systems. I'm curious to know what percentage of users would have a problem running code that used curl?

To find out if your server supports curl functions, look at the output from the phpinfo() function and look for a section titled "curl".

Your answers would be greatly appreciated.