Yes, I am original writer of those articles in my blog
20060707 is written about SetHSDPA.exe option, and 20060720 is about English ROM for Dopod CHT9000 (actually for Dopod 838 Pro that just released in Singapore).
I guess SetHSDPA.exe is in the ROM of all HTC hermes devices. The "SetHSDPA.exe /enable" or "SetHSDPA.exe /disable" is described on PreAutoRun.txt file in \Windows folder of Hermes, and be executed it at the first (or hard reset) initializing process of device(before AutoRun from Extended_ROM).
You can check whether HSDPA of your device is enabled or disabled through open the \Windows\PreAutoRun.txt. At least in case of CHT9000, HSDPA is enabled by default.
Regarding the SetHSDPA.zip on the FTP, I guess a Japanese guy (NOT me) has uploaded it, because I saw a post about uploading this file in a Japanese BBS yesterday.
In Japan, NTT DoCoMo (the largest mobile phone service provider in Japan) has started to ship Japanese version of Hermes under the "hTc Z" name from end of last month. hTc Z have also SetHSDPA.exe in the ROM, however it has DISABLED by default, because still DoCoMo has not started HSDPA service on their UMTS network (branded as "FOMA") yet. I heard it will be started end of this month or early September.
So I guess the Japanese poster of this file has copied it from his or her CHT9000, and post into the FTP with /enable shortcut (.lnk).
Originally Posted by ghl10000
HTC Universal (i-mate JASJAR)
HTC Tornado Tempo (i-mate SP5m)
HTC Hermes (Dopod CHT9000)
HTC Breeze (HTC MTeoR)