[Touch GSM ROM Development] happian:
I deleted the "@echo off" line the the batch files, and tried again. Here's what's on my screen:

D:\temp\Blue_Touch_OS_1921_Build 18521.0.7.0_Big_Stor_58.4Mb_V3.01>cd RUU

D:\temp\Blue_Touch_OS_1921_Build 18521.0.7.0_Big_Stor_58.4Mb_V3.01\RUU>ren ELF_U

SPL_v1.n ELF_USPL_v1.nbh

D:\temp\Blue_Touch_OS_1921_Build 18521.0.7.0_Big_Stor_58.4Mb_V3.01\RUU>ren Blue_

Touch_OS_1921_Build 18521.0.7.0_Big_Stor_58.4Mb_V3.01.nbh Blue_Touch_OS_1921_Bui

ld 18521.0.7.0_Big_Stor_58.4Mb_V3.01.n

The syntax of the command is incorrect.

D:\temp\Blue_Touch_OS_1921_Build 18521.0.7.0_Big_Stor_58.4Mb_V3.01\RUU>cd ..

D:\temp\Blue_Touch_OS_1921_Build 18521.0.7.0_Big_Stor_58.4Mb_V3.01>elf-uspl.exe

*************************************************************

HTC ELF / HTC Touch / HTC P3450 USPL CID Unlocker by pof

Features:

1. SuperCID / SecLevel=0 (set 32)

2. Does not check Model ID

3. Does not check signature

This software is free to use but at your own risk, I take

no responsiblity for any conflict, fault, or damage caused

to your phone by this unlocking procedure. No warranties

of any kind are given, any commercial use of this unlocker

is prohibited.

Donations: I spent some time and money developing this free

unlocker, there's no need to pay me for that, but donations

are always appreciated, and help to buy new devices.

My Paypal address: pau@eslack.org - thanks!

*************************************************************

Please make sure Activesync is enabled (green icon in systray)

and hit ENTER to start...

STEP 1/3......50%......75%....100%

The next step will load a patched bootloader (SPL) on your device

it will make your device temporary SuperCID (seclevel=0), and will

avoid modelID and signature checking when flashing NBH files.

Hit ENTER to continue...

STEP 2/3.....15%.....25%...50%...75%.....100%

Phone screen should now be blank and the activesync icon gray

if not, the loading procedure has failed and you'll have to repeat again.

If all was OK hit ENTER and the standard "PDA Phone ROM Update Utility"

window will start, allowing you to flash patched SPL on your device.

Hit CTRL+C to Cancel or ENTER to continue...

Follow the steps on the wizard to flash the patched SPL, when this

step completes your device will reboot.

STEP 3/3 - Launching RUU, please wait...

D:\temp\Blue_Touch_OS_1921_Build 18521.0.7.0_Big_Stor_58.4Mb_V3.01>cd RUU

D:\temp\Blue_Touch_OS_1921_Build 18521.0.7.0_Big_Stor_58.4Mb_V3.01\RUU>ren ELF_U

SPL_v1.nbh ELF_USPL_v1.n

D:\temp\Blue_Touch_OS_1921_Build 18521.0.7.0_Big_Stor_58.4Mb_V3.01\RUU>ren Blue_

Touch_OS_1921_Build 18521.0.7.0_Big_Stor_58.4Mb_V3.01.n Blue_Touch_OS_1921_Build

18521.0.7.0_Big_Stor_58.4Mb_V3.01.nbh

The syntax of the command is incorrect.

D:\temp\Blue_Touch_OS_1921_Build 18521.0.7.0_Big_Stor_58.4Mb_V3.01\RUU>ROMUpdate

Utility.exe

Process is finished, congratulations!

If you find it useful don't forget to donate :)

*************************************************************

(c)2007 pof - XDA Developers

Hit ENTER to quit.

I know that since so many people flashed this ROM successfully, it may be my problem that causes it to fail. But if you study the batch output listed above, you'll find something really strange:

start.bat switches the file extension of "ELF_USPL_v1.n" and "Blue_Touch_OS_1921_Build 18521.0.7.0_Big_Stor_58.4Mb_V3.01.nbh" then starts pof's elf-uspl, elf-uspl.exe performs 1/3 and 2/2, then it calls "ruu.bat", ruu.bat switches the file extension of ELF_USPL_v1.nbh" and "Blue_Touch_OS_1921_Build 18521.0.7.0_Big_Stor_58.4Mb_V3.01.n" again and then calls ROMUpdateUtility.exe. So, if the cmds are executed successfully, before ROMUpdateUtility.exe is executed, the file extensions of "ELF_USPL_v1.n" and "Blue_Touch_OS_1921_Build 18521.0.7.0_Big_Stor_58.4Mb_V3.01.nbh" are not changed at all! Why perform those useless steps?