shop in getsimple

[xxdex]

i'm was find in internet a shop with one work's in xml files (no data base)
http://demo.opensolution.org/Quick.Cart/?sLang=en

is any posibility to create a some plugin with one will works like a shop ?
i know is a plugin
http://get-simple.info/extend/plugin/dominion-jcart/46/
but it's too simple.. no registration.. no other payments methood.

i think shop with:
- registration users
- mail comfirmation registering
- extra prices
- multiple category
- couple of payments methood
- when create a new products write how much products is available
- comments of products
- star rate product (example 4 of 5 star's)
- pagify of products
- add short description, full description
- image thumb
- gallery for product
- ask of product
- button compare.. two products..
- product highlighted (if yes.. in what time - 1-7 days. 1-12 months..
- newsletter
- choose payment's methood (payu, paupall ...)

i know that's is bigger than i think... and so complicated
but if someone will be can take to write such a great plugin .. the whole community will probably be grateful

ps: please me not to laugh at me for such ideas. is the only creative development proposals for adding plug-ins .. great CMS that is GetSimple.