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I have an HP3822 which is actually the same printer except for the label on the outside. (I think it is some sort of dodge to avoid "price matches").
If you upgrade to the latest CUPS and foomatic it will work - I use Mandrake 9.1 and the printer setup detects it correctly and can print at 300, 600 or 1200 dpi. I don't know how Red Hat goes about it, but I'm sure it's similar. I run Mandrake Control Centre>Hardware>Printers>Add printer and follow the prompts!
I had the problem: "Unable to open USB device "usb:/dev/usb/lp0": No such device"
Turns out i had compiled the kernel with the wrong usb access specification. I use "make menuconfig" to configure my kernel since it is much more handy then the arbitrary. In menuconfig (2.6.5 kernel) it's located here:
Device Drivers > USB Support >
Here you'll find "OHCI HCD Support" and "UHCI HCD Support". Supposivly you can only use one of the two, so don't select both. I compiled OHCI directly into the kernel... if you do it as a module remember to load them ie. "insmod [modname]". Also in the same directory is "USB Printer Support", I'd make sure to have that one selected also.