I have a 256mb mikomi stick i can save images to it but when i go to photo lab it doesnt have it on the drop down list and also it doesnt show it in the ps2 browser.
I was wondering is their any files i need to add to the memory stick ?
On your computer. They'll be in a folder called "GT4".
As for backing up your save... you'll need a MaxDrive. A regular USB drive won't cut it as the software to recognise the drive is not contained in the PS2.
You can't back up your save on a normal USB stick, nor can you edit pictures in GT4. I'm not 100% sure, but I don't think you can view pictures that are on the stick in the Photo Lab either. The only USB thing you can do to the pictures is to save them onto the stick.
If you want to save a picture onto the USB stick, when saving the picture, select "USB memory" or something like that in the drop-down menu that asks you where you want to save to.
Hope this helps.
- EDIT - A bit late, but it's no shame to lose to Famine.