Installed and seems to work. Tho weighting seems to be quite a bit off (haven't looked at that portion of code yet).
There is no such thing as "weighting." Did you read the readme? Particularly the section on how priority works?Code should be PLENTY more commented btw 
Probably, particularly index.php. The rest is fairly well-separated and should be readable as-is. My philosophy on comments is that if you have to comment a lot, your code doesn't explain itself well enough and should be refactored.