and changed it to
HighNumberFormat=HEX
AsmAddrFormat=HEX
AsmDataFormat=HEX
AsmBitsFormat=HEX
and now it generates hex numbers. With Processor Expert open I could find these under options but I couldn't find an equivalent when using Device Initialization. I'm sure there must be a better way than editting the .iPE file so if anyone knows it I'm still interested to find out.