Hello & welcome, SethVanV !
I checked my SD30 camera and discovered that it uses 1.00H firmware.
...
I downloaded both the full "G" and "H" firmware. When i tried installing the "H" version...
There's only a CHDK version for the SD30 with firmware
1.00G, so which "H" version do you mean ?
The CHDK must be ported (programmed) for almost each firmware version; so if the 1.00G version do not run on your camera with
1.00H fw, the camera crashes - remove & reinsert the batteries to start your cam again without CHDK.
To use CHDK on your 1.00H camera, it must be ported to this firmware....