create a app as multiple plugin

Hai and thanks in advance

i am newbie and now i ve started to craete a project in which it will be like shopping website,in this i will ve paypal,icici,etc payment modes.

I dont whether to create as module or extension and the admin has the right to select in what are all mode the payment should be in site,ie if admin select paypal and didnt select icici,in the site the payment mode should be in paypal mode only.

ie dynamically we need to add and remove the module or extension in the site…

That is too complicate to understand can u call me get my no. in profile i will guide you