the car will run just fine on a stock tune file with the turbo swapped
biggest limitation will be fuel-- the 1.8 hpfp does not flow very much. 2.0 hpfp/vac pump can be swapped, but hptuners doesnt have the tables needed to make that work right. However this would work OK for pump gas / light E mix setup. MPI is of course the ultimate solution.
you'll need the "boost/wastegate logic" OS patch or you wont be able to properly tune boost. It's only on a few OSs and I don't know if it's been added for any 1.8 files.