PC Anywhere Ports

I have just configured multiple devices on my network to act as PC Anywhere hosts. I've done this by enabling port forwarding on my firewall. Everything work okay, but I've a quick question:

By industry standard, the port range for PC Anywhere is 5631-5632. And for additional devices, the ports would be 5633-5634, 5635-5636, etc. Technically I could have an infinite amount of PC Anywhere hosts on my network, but eventually these occupied ports would consume ports reserved for other application types.

How would I overcome this challenge?

Thanks

Actualy technicly you could not have an infinate amount as there are only 65535 ports available, and usualy 1 thru 1024 are reserved for system stuff ( which is why protocols such as ftp starts its data path at 1024 or first available after that )and common protocols leaving roughly 64000 ports usable. But dont worry only one app can be listening on a single port so overlapping is not an issue hehehe!