I have the avia home theatre dvd with the convergence test patterns, but as you say I am not sure what the pots do exactly, would these be the same for most projection tv's.
here are the pots:

H-SIZE H-LIN V-BOW H-BOW V-LIN V-SIZE H-SKEW H-KS V-KS
R1191 R1182 R1183 R1158 R1157 R1136 R1137 R1141 R1121

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R1190 R1180 R1181 R1160 R1159 R1138 R1139 R1255 R1120

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