I bought the Dell 1600n because it said it was a PostScript printer, assuming they just use standard PostScript drivers. Well, as it turns out, there's some lame stuff in either Dell's printer drivers, or x64's printer model that doesn't let the normal PostScript Dell printer driver install. All you actually have to do is enable TCP/IP printing on the 1600n, create the TCP/IP port manually (this is done by selecting 'local printer' and creating a new TCP/IP port), then tell your system you have something like an HP 4000 PS, or a LaserWriter Pro 630. Once you've done this, you can take the Dell PPD file [found on a 32 bit system in %WINDIR%\system32\spool\drivers\w32x86\3] and copy it over the top of the HP 4000 (or the LWPro 630) PPD file that is in %WINDIR%\system32\spool\drivers\x64\3 Then you get the correct options page for stuff like resolution, and the thing just works.
I don't have a solution for the network scanning thing, but quite frankly, the quality of the scan using that is only good enough for crappy archival, and that goes to my server, right now. Perhaps I'll get a USB connection working eventually, but I believe there are actually functions being executed in order to do that.
Anyway, I'm just happy to have my 22PPM 1200dpi printer working from my x64 OS! YAY!