Here's a little more explanation on how to install SIPChange:
First, make a new folder under program files called "sipchange" then place the sipchange executable (downloaded from the above attachment) into that folder and rename it if necessary to sipchange.exe.
Now, using file explorer, navigate to \program files\spichange and then tap and hold on sipchange.exe. Choose "copy".
Now, navigate to \windows\startup with filemanager and choose "Paste shortcut" from the menu.
Here's the part where you need a third party program. You now need to modify the execution properties of shortcut you just pasted into the startup folder. Several programs can do this. I use a utility called GSFinder+ which a free file explorer replacement. What you need to do is to change the shortcut execution properties from "\program files\sipchange\sipchange.exe" to "\program files\sipchange\sipchange.exe" SET
There is also a way to do this without any third party file explorers by editing the shortcut file itself with notepad on your PC. The thread that explains this is located here
I'm not sure how my attachment got renamed from sipchange.exe to sipchange_182.exe tho....
SIPChange shouldn't ever remain in memory longer than 10 seconds when run with the SET parameter. You can check this with settings/system/memory/running programs. So it shouldn't have any effect on program execution time unless you are somehow setting the SIP to something invalid. Try this: make sure that you have run sipchange.exe at least once with no parameter and set a default. I'm assuming you have already done this to sett the letter recognizer as your preferred default. If you haven't, it is possible that something strange may be happening because no default SIP registry entry is present. However, in this case, the set SIP operation should just return an error (which is ignored by SIPChange). I'll check into it though.
SET is indeed the only parameter it recognizes. When it sees SET as an execution parameter, it attempts to change the SIP to the input method you chose when you last pressed "Set Default".
Btw on my 8125 I just used SIPChange to set letter recognizer as my default thinking it may have something to do with the letter recognizer default iteself. Then I soft reset. Unfortunately tho, I'm not seeing the delay you mention
. I'm not using the official Cingular AKU2 release as you though. I am running AKU2.3 from Summiter's multi-installer.