Some "WorkFlow in Portal" questions incl. WF from R/3

Hi guys!

1.

We need to integrate (somehow) the R/3 workflow into the NW Portal application. What would be the best approach to achieve this? Is it only question od some settings and components, or is some development needed?

2.

Standard "WorkFlow" in Portal is very "lite". Is it possible (somehow) to create some standard processes there? Like purchase requisition, helpdesk request, ...

Infos from the field are very welcome!

Peter