connecting to a CUPS 1.3.7 from the lan and internet

[crp]

On a pc running Fedora4 with cups-1.1.23-15.4 , I have printers setup that can accept lp submitted jobs from other pcs, including windows pc on the LAN and a UNIX machine that is not on the lan.
I would like to get the same functionality going with CentOS5.5 and cups 1.3.7-18.el5 5.7

On the CentOS pc:
. lpstat -p -d
. printer 5si is idle. enabled since Tue 14 Sep 2010 03:30:34 PM PDT
. printer Cups-PDF is idle. enabled since Thu 03 Jun 2010 09:42:49 AM PDT
. printer PDF is idle. enabled since Tue 14 Sep 2010 03:30:34 PM PDT
. printer TLR is idle. enabled since Tue 14 Sep 2010 10:45:35 AM PDT
. printer Tek is idle. enabled since Tue 14 Sep 2010 03:30:34 PM PDT
. no system default destination

and job submitting via lpr -P TDLR -H Centos sample.file
works just great.

when I go to a windows pc on the lan I get the following:

R:\remitw>lpq -S fedora4 -P TLR -l
. TLR is not ready
. no entries

BUT the request to the CentOS does not work

R:\remitw>lpq -S Centos -P TLR -l
. Error: No response from Centos.

and trying to lpr from a pc on the lan results in
. Error: print server unreachable or specified printer does not exist.

I went throught the cupsd.conf on the CentOS, which was pretty sparse and tried manually adjusting it to try to match the Fedora version. When those didn't work I just copied over the whole file from Fedora -> CentOS but that still didn't get me working.

Each time I changed the cupsd.conf I also restarted the cupsd service.
The firewall settings for ports 515 & 631 are the same on the Fedora and CentOS.
There is no 'error activity' showing in the logs on the CentOS.

So I'm stumped. is there an "out-of-the-box" way to migrate the Fedora CUPS setup to CentOS ? If not, how do I setup the printers and cups so that pc's other than the machine itself can access the printers?