Yes, HTC DHD has 8255 SoC. However, there are some internet posts/docs mention that the code name of 8255 is 7x30.
Also as the diagram in the page you posted, the S2 has 7230, 7630, 8255, 8655 so assuming the 8xxx is backward compatible with older one like 7230, it makes sense that the 7x30 file will work on both 7x30 and 8x55.
Anyway those folder name/SVN path I posted are just samples (which are mentioned in the dev doc), if we can find a path as ' AMSS/products/8255', or ' AMSS/products/825x/' then it will be better than the ' AMSS/products/7x30'.
I found this thread:
http://forum.xda-developers.com/showthread.php?t=2197265
Maybe @onejay09 wish to help?
In his thread I found this:
http://faq.riffbox.org/index.php?action=artikel&cat=10&id=53&artlang=en
It wouldn't help with easy solve but maybe can explain some thing because they explaining how it works on DHD.
Principles perhaps can be similar (?????).