That would be cool to see scripting within the $loop() function. 
I have uploaded a file that contains the changes I made to the MTE, HTM and XSL files. You will notice that there are two sets of HTM/MTE files: one for MP3, and one for FLAC. I did this so that I can pull out and store information for my two directory paths.
I know I could have done it differently, such that there is only one MTE file, but there would still need to be a separate HTM file for each codec. So I just made paired files.
Here is the ZIP: XSL_Squonk_mod.zip (8.89 KB)
Some changes that I made:
-I modified the $loop(%artist%) to account for my %album artist% tag.--I use x:/music/mp3/artist(album artist)/album/track.mp3 for my directory structure. This allows me to use "Various Artist" for compilations, otherwise, it would not keep all the tracks from a compilation together. It will sort artists while ignoring "The " in the artist name, however it will still display the "The ". For example, "The Beatles" will be in the B's, not the T's.
-Under the album loop, I made the change to correct of the problem with the "#" symbol.
-I also added a line, which is now used in the XSL to store the average bitrate from the entire album. (courtesy of dano 
)
-I changed the $loop(%_filename_ext%) to $loop($num(%track%,2)). I did this because it kept wanting to sort tracks alphabetically...rather than numerically.
-There is also a new line in the loop (beginning with "$puts"), which is the second half of the code from dano. This is what actually creates the average bitrate for all of the tracks in the album loop.
-I added a $replace function to shorten the codec. Just thought it would help clean up the actual page in Firefox and IE.
-I also added the which is the compression ratio and %. The actual bitrate and compression for the individual tracks now appear beneath the time and size in Firefox and IE.
-To clean up the web page, I also converted the samplerate to KHz. I also added a $replace function to add in the "&" between ID3V1 ID3V2 for MP3 files.
-For the filename and filenamepath, I added in the fix for the "#" symbol.
I think that is it. Some of these are just personal preference for the layout. Hope everyone likes it.
Edit: As dano noted above, the use of %_parent_directory% means you have to have 2.35a installed.
Edit 2: ZIP file updated on 2/11.
~Kockroach
XSL_Squonk_mod.zip (8.89 KB)