As I recently mentioned in a different thread in the troubleshooting section, I just bought the OEM Volvo diagnostic unit for earlier models that doesn't work with VADIS / VIDA, which is S/V40 up to 2000 & all other models up to 1998.
More than just a code reader, this diagnostic unit does EVERYTHING such as activating individual components to check their functionality, program a new transponder chipped key to the car's immobiliser unit, program a new remote to the alarm system on S/V40 & S/V/C70 and more. Basically anything dealers can do as this is the real McCoy.
If you're in Melbourne you're more than welcome to drop by & use this diagnostic unit, I'm on the north side near Essendon airport. Not going to set a fee but any donation will be greatly appreciated!!