The decals are no big secret, it's simply a case of mess about with an image on Photoshop (or similar) then print it out onto decal paper which is widely available from Ebay or most good arty farty type craft shops.
Water Slide Decal Paper A4 INKJET Waterslide Transfer Paper | eBay
A quick spray over with a clear lacquer to fix it and you're away. They work in exactly the same way as the ones you get with Airfix kits and the like. You just need to remember to cut them out very close to the image because the lacquer also acts as a carrier film.
The only issue I've had is that without spending 1000's of quids on an ALPS printer, white and pale colours are next to impossible to produce. There is a workaround though, if you absolutely need
a pale coloured decal then make sure that whatever you're going to mount it on is either white or very pale - that way the colour will show. OR... you could use white decal paper but I've found this to be problematic too, especially with intricate designs.
As for the build log...
Just for a change I've remebered this time - See HMS VIGO