I open a psd I downloaded from here, and it comes up with this: I think I have 500 mg ram or somethin like that, but how do I make it so I can open stuff up?
Try closing all of your other programs, that may free up more RAM. (having firefox,MSN,Googletalk,AIM,and Itunes Photoshop needs alot of RAM)
Depending on your operating system, for example Windows 2000, you coudl increase your virtual memory. I would also try to clear out my cache and cookies. See if that would work to clear some memory space. And there's always the taskbar to see which programs you don't need open in the background.
You can use this program to help free up memory http://www.yourwaresolutions.com/software.html#framxpro Make sure ou disable the auto-freeing part though, its a pain. Just use the "free now" option.
Here's the Mircosoft link on how to increase Virtual Memory on Windows XP: http://support.microsoft.com/?kbid=308417
----ing omg, if you dont know wtf your talking about, dont post. 512mb RAM is plenty for running most things. if your low on RAM, just reboot your computer, whenever your reboot, your memory is erased. i think that happened to me once after i left my computer running like a week straight.
That appears to be PS6 or similar. I had that problem with PS6, and I could never fix it...when I upgraded to CS2, it disappeared...so I know it wasn't a lack of RAM...