I want to try and use the core paypal payment processing for managing simple role subscriptions and have some queries.

Is there any way to stop it showing the trial options to the user without having to hide them in the code. Putting nothing in the trial fields doesn't remove the option and the user can subscribe to a non-existant trial. Surely there must be a way to simply not have a trial?

Also, the fee for a free role is displayed as "Every -1"? That just won't make sense to anyone. Is there a way to make it display either "Free" or "$0.00" or a blank instead?

And also, When a user tries to remove a role that was paid for (by clicking the Remove link), they are taken to a sign in page at paypal. However, one cannot remove the role nor reverse the payment, so why is it taking the user there? Clicking Remove should simply remove the role. Can it be made to do that?

Any advice is much appreciated,

Rob