Creating a Custom "configuration" for checking out on certain products

[ukndoit]

So, I want to make it where if someone adds a certain product to their shopping cart, which can be based upon a particular group, or product, (probably best to be on product, so I can add it on the configuration tab)...

anyhow, I want it to have them choose one of the available spaces the product has, and each one is first come first serve, so once someone selects one, it would not let someone else select it, so either grey it out, or hide it altogether.

Also, using the stock control, I want to limit the number, say, 13, and allow multiple purchases, so if someone selects a qty of 2, then they would have to select 2 places on the configuration, but could not select more, or less, they must choose the number of the qty they choose to order...

So, what hook would I setup to have it load the "options" I want it to have as a configuration?

are there people in here that do customization's, that can get me their price to just do it for me? PM Me or email me a price? I'be been looking around and got a few, I'm just trying to find the best one that understands it clearly, so it will work how I want.

I'm a programmer, but don't know the WHMCS platform good enough to just do it all, but I can figure it out, if I find out the hook to create it for. If it was a hook.
I really don't know.

I'm way, way better at Perl code than PHP, but decent at PHP.
(It is for a co-op ad system, which will always have a limited number of spaces, first come, first serve)

Thanks in advance any advice, or whatever.

[ukndoit]

can someone tell me the name of the hook that I can call, immediately AFTER the Configuration fields load? so I could create a hook to do what I need it to do? So same time as configuration fields, but just after they load, when someone checks out?