You just need an AFR gauge to get an idea of how the engines fuelling whilst your mapping it.
The OFAM from boostmonkeys plugs into the EFi loom, direct plug and play (other than a vacumn line into the ecu) its £380 and will come with a basemap to get your car started and idling to a degree.
Map it yourself using "tunerstudio" its easy enough to get to grips with.