Calling IPC from a third party web application

ISA, IPC experts,

We have CRM 4.0 with IPC 4.0. We are developing an in house web application in jsp/java for dealer orders. Our office staff uses CRM Online for Order Entry.

We want to use the existing pricing procedures in the IPC to derive the pricing for the web project so our user can see the price for a given product prior to placing the order in CRM.

How can we call IPC from a third party order software in java? prefereably without installing a standalone IPC (heard that IPC 5.0 may not support standalone mode)?

Can you help us with ways to call the IPC from our in house web application, or point us to some documentation about the ipc client layer?

Your help in this regard is highly appreciated.

Yanhui Yu