I've been trying my hand at skinning and have never used PhotoShop up untill about a week ago, and it's greatand was wondering is it possible to have PhotoShop auto-update the .jpg file in CMXviewer/data/skins as it makes it that much more labourious having to export the psd to .jpg every time you want to check your work.
Can this be done?

You can record an "Action" and play it back (it's also bindable to a keystroke).
Check the "Actions" window/panel.

Quote from xaotik :

You can record an "Action" and play it back (it's also bindable to a keystroke).
Check the "Actions" window/panel.

good man!