Well I find this
http://www.paehl.com/open_source/?HTML_Tidy_for_Windows
This program makes something like change and format htm to Xhtml. So download and make the batch, you know:
tidy [-switches]
bookcontent.cfm@id=c0010307x.htm
tidy [-switches]
bookcontent.cfm@id=c0010307x.htm
tidy [-switches]
bookcontent.cfm@id=hc001001.htm
tidy [-switches]
bookcontent.cfm@id=hc001002.htm
tidy [-switches]
bookcontent.cfm@id=hc001003.htm
tidy [-switches]
bookcontent.cfm@id=hc001003.htm
.........
I'll write if this prereassortment make the conversion faster.