[Typo3-shop] Additional Features for tt_products 2.x - how to contribute?

[JoH]

Hi list, hi Franz.

Since we are some of those people that added their own proprietary PHP code
to extend the good old tt_products 1.x without ever publishing it, we wanted
to make it better this time.
We already have created different existing features like
- up to 10 features per item selectable by checkboxes (DB value is the
binary of these, labels can be different on a per page basis)
- saving, recalling and copying of existing orders
- saving additional adress data (delivery-adress, billing-adress, contact
person) that can be filled in by the client via selectboxes

You can see those features at http://www.flyerking.de (Login required, but
setting up an account is for free)

and we would like to add more features like
- calculation of "pieces" based on measures (Width * Height = sqm --> sqm *
pcs = pcs-sum) for items like bannerprints, wooden panels, or anything else
you could imagine
- numbered positions in the order form
- advertising bonus:
    A client advertises the shop with a link.
    For each new order that is generated through this link he will get X%
bonus.
    Client can choose when to use this bonus.

More to come ...

To make all these features available for new tt_products we would like to
know how we could collaborate and have them implemented into the original
code instead of creating a new proprietary extension.
Possible scenarios:
a) we create PHP code that can be hooked somehow to the original code and
then be activated via TS params
b) we work directly with the original code and send you the modifications
c) you (or someone else) creates PHP code and we will sponsor this
development with a sum X
d) a+b OR a+c OR ...

So could you please tell us the best way to do it?

TIA

Joey

-- 
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(If you have no clues: simply shut your knob sometimes!)
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