manual payment and frontpage display option for marketpress


I am implementing marketpress using the twentyten theme. However, I cannot use any of the payment gateways in my region and would like to adopt a manual payment system i.e. after checkout, display full price details and bank account details where payment should be made.

Also how easy would it be to implement another payment system should that be requested by a client.

My second issue is that I would like to display my marketpress products on the front page of the site. What do i need to do. I have the widget display working fine, but rather than have blog post showing when you enter the site, I would like to display products (e.g. latest) as in the demo (but would like this to be the main page of the site).

Thanks again.