Back on post 1106 I listed the SX20 PropCas IDs that I had found. Since then I have found a few more so I decided to post an updated listing here for those who might be interested in using some of them in their scripts for the SX20.
PropID Description
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5 AF Assist Beam Setting (0=OFF, 1=ON)
8 AF Frame (1=Flexzone 2=Face Detect)
12 Continuous AF (0=OFF, 1=ON)
26 av96
34 bv96
50 Mode Dial setting
8228 Custom
-32767 Manual
-32766 Av
-32765 Tv
-32764 Program
-32768 Auto
-32755 Portrait
-32756 Landscape
-32757 Night Snapshot
-32249 Sports
16402 Sunset
-32246 Stitch Assist
2600 Movie
66 Date stamp (0=Off 1=Date 2=Date & Time)
102 Drive Mode (0=single 1=continuous 2=continuous shooting AF)
127 Flash Exposure Compensation (+/- 32, 64, 96, 128, 160, 192 = +/- 1/3, 2/3, 1, 1 1/3, 1 2/3, 2)
133 MF (0=OFF, 1=ON); opposite of AF (i.e if MF=1 then AF=0)
149 ISO (Auto, 80, 100, 200, 400, 800, 1600, 3200 using SCN & mode dial)
0 Auto
80 ISO 80
100 ISO 100
200 ISO 200
400 ISO 400
800 ISO 800
1600 ISO 1600
3200 ISO 3200
155 Type of metering (0=Evaluative 1=Spot 2=Center Weighted)
169 Video Quality (1=320x240 2=640x480 4=1280x720)
209 Exposure Compensation Dial (+/- 32, 64, 96, 128, 160, 192 = +/- 1/3, 2/3, 1, 1 1/3, 1 2/3, 2)
214 'Review Info' available after taking photo (0=OFF 1=Detailed 2=Focus Check)
220 Photo resolution/size (0=Large 1=Med 1 2=Med 2 3=Med 3 4=Sending email 8=Wide)
225 Delay Timer (0=OFF 1=2 sec 2=10 sec 3=Custom/3 shots 4=3 shots)
249 sv96
266 tv96
270 White Balance
0 Auto
1 Daylight
2 Cloudy
3 Tungsten
4 Fluorescent
5 Fluorescent H
6 Flash
7 Custom
281 Safety MF (0=OFF, 1=ON)
282 AF (0=OFF, 1=ON); opposite of MF (i.e if AF=1 then MF=0)
297 Servo AF (0=OFF, 1=ON