Lotus 6 and Web Services to connect to PeopleSoft

Hi All,

I am new to web services. I have got a project in which the PeopleSoft will send data to Lotus Notes using web services. And then Lotus Notes will send a response to PeopleSoft. After this is done the Lotus Notes will send mail to users in Lotus Notes. These users then will click on a button which will again send the data to peoplesoft.

If someone can help me how I can achieve this or if you can send me some informative links then it will be great help.

Siddhartha