Well, you've already figured out that the HP-provided driver only does direct-connect USB, right?
You need a CUPS driver to use the CUPS network printing protocols in OS X (IP printing & Windows printing). Here are the sources of CUPS drivers I know of:
http://www.linux-foundation.org/en/OpenPrinting/macosx
http://sourceforge.net/project/showfiles.php?group_id=1537
http://www.printfab.net
http://www.easysw.com/printpro/

I don't see the PSC 2410 directly listed in any of these. I think you need to experiment - try the HP Deskjet 900 Series Gimp-Print or 990C Gutenprint driver.

Then for the print server, make sure you read the manual and select the correct protocol - and enter the device's queue name (from the manual) where required.

I registered just to help out here, since i just solved the same problem with that same printer.

http://www.linuxprinting.org/show_printer.cgi?recnum=HP-DeskJet_990C

Go there, and get the PPD file for the deskjet 990C

When adding the printer to use with a linksys print server, put these values in... first select "IP Printing." Then under protocol, select "Line Printer Daemon - LPD"... for some reason i couldn't get IPP to work. Then under "Queue" type "lp" in lowercase... it also won't work if that's not correct. Name it whatever you want, use the IP address you've already configured.

Now here's where that PPD file comes in. Where it says "Print Using" select "other" from the drop down box... a file open dialog opens up. Select that PPD file for the deskjet that you just downloaded, and voila, printing works.

Since I am not a regular at this forum, if you have trouble, email me at "thefitzvh@gmail.com"

Hope this helps. You'll also notice that if you go to that linuxprinting.org site and select the PSC 2410, I've added the above info to the page.


Jim