Interesting Test – Install ArcSWAT for ArcGIS 10.0/10.1 on ArcGIS 9.3
Method in post “Manually Install ArcSWAT” was used to install ArcSWAT for ArcGIS 10.0/10.1 on ArcGIS 9.3. The installation is successful but there are some problem in stream network generation (no problem in flow direction and accumulation calculation). The reason is the new version manager system in ArcGIS 10 (new file ArcGISVersion.dll located in C:\Program Files (x86)\Common Files\ArcGIS\bin). However, it would be enough for an existing model.