Quote: "Can FPSC handle 1280x1280?"
No, I think you have to stick with powers of two, 512x512, 1024x1024, then 2048x2048. I know that some rendering engines can use odd sized texture maps by padding them out to the next appropriate size, so it might actually appear in-game, but it'll be using as much graphic memory as a 2048x2048 texture, so you'd be better off resampling it in a graphics program to 1024x1024.
Cheers
- Graham
EDIT
LOL, crossposted with jon with such perfect timing that when I hit 'post message' the screen refreshed with his reply not mine, causing a slight 'Twilight Zone' moment on my part - until I realised that my reply was on the next page