Well, this is the vital stuff from the babel fish translation:
"The 128*36px of header 0 (the 4ch) with, it is supplied over the $4800 byte of $37f0 - $c7"0, (size fixing). It meaning that the fact
that it extracts is the Fill.raw, we want referring, (it is redundancy, but when you open that way, being to be the CMYK, converting to
the RGB+Alpha by way of multichannel)
It is the height 36px, but
Upper 20px amount with the background, is the part where lower 16px amount shows progress.


One more the 8*20px of header 0 (the 4ch) with is the $280 byte of $3570 - $37f0. This part is used in both side part of the
progress indicator, being divided at side half. Furthermore because as for this as for equivalent of 2 px from inside it catches to the
background, those where it is really drawn 2px amount outside, in other words are just the shadow part.
Being the layer to do to divide with the Indicator.psd, we want referring details."


So that's two images you need to change, one is tha fill and the other is the caps. Hope that helps.