XeNTaX

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so the first attribute is the ascii signatures. this is our "id string" which helps identify the format

as there are 2 possible strings of the same length (the size of a dword - or 4 bytes) we can use this:
which gets the first 4 characters in the file. we can now do an optional check that this string is correct
then we can continue getting the values you've listed:
next is the image data, and we can just use the "log" function to save it out from the current file position. something like this:
notice the blank filename. quickbms will identify the dds signature and give it a relevant filename for us! this is really helpful when formats like this dont store names!

we need to skip to the next image.. so we can add the image size to the current position and seek to it
now we're at the next image. because we don't really know how many images are here, we can wrap this into an infinite loop using FOR and NEXT like so:
there is an error at the end of this script because we don't check for the end of the file. quickbms doesn't crash but we can avoid this by adding a filesize check:
try commenting each line against the quickbms documentation if you need more understanding

Thanks for the help, that's a lot easier to understand than the way the documentation is set up. I'm going to try to work with a more complicated format soon, but I'll probably get confused trying to work with the filenames, so I'll probably be back to ask for more help soon.