Load Balancing - Multiple Services for one VIP

[Nyper]

I am working with an Alteon AD4.

I have a Virtual IP set up, and can assign the HTTP service, group, etc, and it will work fine.

However, I need more than just HTTP. I need ALL traffic directed at the VIP to be directed to a specific group.

Then all traffic directed at another VIP will be directed to another group.

Further explanation....
Here is my setup.

Virtual IP 1: xx.xx.1.150
Service: HTTP *
Group: 1 (contains real server xx.xx.1.2)

Virtual IP 2: xx.xx.1.151
Service: HTTP *
Group: 2 (contains real server xx.xx.1.55)

I need all traffic directed towards VIP1 (.150) to be directed towards Group 1. If I try to add another service (like FTP), then when I direct my web browser at this VIP, nothing happens. How can I accomplish this?

.....
essentially, Group 2 consists of dedicated email servers. Any SMTP coming in needs to be directed to Group2.
Group 1 consists of web servers. All traffic directed at VIP1 needs to be directed to this group. I can't just restrict my services to SMTP and HTTP because the web servers also have SMTP servers operating.