Catalyst 3560 packet forwarding dependant on server IP and destination port

Hi experts,

I hope the following makes sense, and that someone can help!

We have a Catalyst 3560 as our LAN default gateway with 2 VLANs:

VLAN 1 is 172.16.0.1/255.255.252.0
VLAN 2 is 99.99.99.245/255.255.255.0

We have two Cisco Pix's which traffic is forwarded to:

Pix 1 is 172.16.0.3 (ISP 1)
Pix 2 is 172.16.0.4 (ISP 2)

We have 2 Solaris servers which are on the 99.99.99.x VLAN, so they use 99.99.99.245 as their gateway:

Solaris server 1 is 99.99.99.9
Solaris server 2 is 99.99.99.10

 They run an application which connects to 3 different remote ADSL sites on three unique destination ports (9911, 9912, 9913) - but only one of the Solaris servers is ever on at any one time.

Currently, all packets through these ports go to these 3 sites via Pix 1. What I want to do is configure the Catalyst 3560 to interrogate the packets from both servers (ONLY from these servers, I don't wish to interrogate every packet from every device!) and then:

If outbound traffic from 99.99.99.9 is on port 9911, go to Pix 1 (172.16.0.3)
If outbound traffic from 99.99.99.10 is on port 9911, go to Pix 1 (172.16.0.3)

If outbound traffic from 99.99.99.9 is on port 9912, go to Pix 2 (172.16.0.4)
If outbound traffic from 99.99.99.10 is on port 9912, go to Pix 2 (172.16.0.4)

If outbound traffic from 99.99.99.9 is on port 9913, go to Pix 2 (172.16.0.4)
If outbound traffic from 99.99.99.10 is on port 9913, go to Pix 2 (172.16.0.4)

How can I achieve this on the C3560? And can I add the commands and remove them quickly without having to restart the switch?

Any help appreciated!