[snapgalaxy] Size of image sent to 3rd-party printer sites

Hi all,

I'm working on setting up my first Gallery and have it set up to use the "Print to Snapgalaxy.com" plug-in so that I can sell photo prints. The problem I'm having is this: anytime I click to print one of my photos on Snapgalaxy, the Snapgalaxy cart displays warning flags advising that the prints any larger than 5"x7" are not advised because my photo's resolution is too low. I thought it was just because I'd only updated files from my old 3-megapixel camera, so I experimented with uploading larger files, and ran into problems not being able to upload large print-quality files with the PHP memory_limit. I appear to finally have licked that (with changes to the .htaccess), which I expected to fix my problem, but it hasn't. I have a test image uploaded which is 300dpi and approx. 11" x 17", which should be more than adequate to print an 8" x 10" at least, but Snapgalaxy insists the resolution is too low.

What I'm wondering is what image Snapgalaxy gets from my Gallery... whether it's fetching the original high-resolution image or the resized Gallery-display image. Because I don't want my users to be able to just access the high-quality versions of my photos, when I upload I have Gallery resize to 640px, but tell it to keep the original. I'm guessing what's going on is that Snapgalaxy is getting the 640px resized version from Gallery and trying to print that?

Does anyone have experience with this? Is there a smarter way for me to go about this? Basically my need is to keep "guest" users (there aren't any registered users except me) from being able to view and download the high-resolution file, while still allowing the hi-res version out to the vendor so customers can order prints. Is there something painfully obvious I'm missing? Any help would be greatly appreciated. I've been gamely fighting my way through various problems with this software, because I'm anything but a programmer, but I've really hit the wall here and don't know what to do next.

The high-resolution file I uploaded as a test is here: http://redroanstudios.com/gallery/main.php?g2_itemId=578 The rest of the files on the site so far as kind of varying resolution, though the images in the fine art section (http://redroanstudios.com/gallery/main.php?g2_itemId=28) are basically all 300dpi and mostly at least 8" x 10", whereas if you need something low-res to contrast, the entire "graphic design" section is pretty much web resolution.

(The "print to Snapgalaxy" link is in the sidebar, obviously. I've been having trouble lately with every time I click on it I get an "Address not found"... not sure if this is my problem or my server or snapgalaxy or what. Haven't really been able to test it much yet. If you have the same problem, hitting refresh always gets me through.)

Thanks for any help, hope I'm not too much of an annoying noob.

Mac
http://www.redroanstudios.com

Gallery version = 2.3 core 1.3.0
API = Core 7.54, Module 3.9, Theme 2.6, Embed 1.5
PHP version = 5.2.6 cgi-fcgi
Webserver = Apache/2.0.63 (Unix) PHP/4.4.7 mod_ssl/2.0.63 OpenSSL/0.9.7e mod_fastcgi/2.4.2
Database = mysqli 5.0.67-userstats-log, lock.system=flock
Toolkits = ArchiveUpload, Exif, Ffmpeg, Getid3, jpegtran, LinkItemToolkit, NetPBM, Thumbnail, Gd, SquareThumb
Acceleration = none, none
Operating system = Linux franc 2.6.24.2-grsec-p4-peon-1.1.2-grsec #1 SMP Wed Feb 20 15:30:29 PST 2008 i686
Default theme = carbon
gettext = enabled
Locale = en_US
Browser = Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.8) Gecko/2009032609 Firefox/3.0.8