Subscription Mod (Undefined amount)

[Sykoi]

I started a discussion here, but it was never answered and a bit off-topic so I'm starting a new one:

I need to edit the paid subscription area in vB, to allow undefined amounts - so users can enter in a custom amount. I've been looking through the code, and not quite sure which part I'd need to change - and can't afford to make mistakes. I've narrowed it down to functions_subscriptions.php, but there are several parts I'm just not sure on - I want to keep defined amounts while still allowing undefined amounts (That let users enter in the desired amount).

Has anyone already done this? It'd be nice to use code someone else has already worked on, rather than spending hours debugging it and making sure it works, only to find it doesn't when someone does actually use it (Paypal IPN testers don't always work).


Thanks if anyone can help either way - I've been programming in PHP for years, but just started modding - and its quite a bit different (As is processing money - theres something on the line there, other than a few bits/bytes of data).

[Sykoi]

Anyone at all? Rather not just have a button for an undefined amount and add users by hand.