Marc,
Good job you got it figured out - I am currently rebuilding a totally new version of my site, and the Canberra repaint module will temporarily be out of action until I rebuild the gaming section.
Regarding the DXT3 dilemma, we've seen several posts about this recently. I choose to do my tex conversions at extended 32b bit as I prefer the lossless quality to the bitmap - I've tried them at DXT3, trust me, and I notice a drop in quality, especially on gradients. I fully respect the decision of other painters and users to convert my repaints to that format, but I do want to state on record (as it were!) why I do them differently. Everyone's PC handles differently, and believe me, mine is not top notch, but it is able to handle this format.
While you are more than welcome to download the Holker Canberra repaints, don't forget a whole new series is coming out soon that should be better (not sure about frame rate-wise though) than before as I've learnt a few more tricks since then!
Best,
Steve