I've already consult with Ecupro, he said
if maintain auto trans, then even if use standalone... you could only activate them as piggyback... this is also concurred by Cipan (MegaSquirt installer)...
I need to meet Cipan to discuss the best option/route to take on this. I will update back.
Why don't you post the issues to both Ecupro and Cipan? They're in Engine Management thread... and their standalone ECU roughly cost @ RM3K including installation, details better check with them.
Protech - self built standalone ecu by Ecupro from Ipoh, few version already. Old Toyota sifus knew him.
MegaSquirt - diy standalone ecu, could also be a piggyback depends on part and what's activated. Cipan mostly known as sifu on this.
sigh... if only my wife agrees to changing to manual trans...