If the URL looks like:
https://www.webassign.net/v4cgi/extra/bc_enhanced/index.tpl?asset=read_it&asset_url=/bc_enhanced/SerPSE8_w_player/read_it/serpse8.32.02.swf&UserPass=
Change the URL, "serpse8.32.02"
The "32" is the "chapter" and then the "02" is the "section number".
chapter.section