Things went overcomplicated. I'm getting warnings over simple conversions like Enterprise -> Web Server. I'm announcing a development reset of ConvertNT5SKUs. There won't be a v3.0.0 RC4 of ConvertNT5SKUs. v3.0.0 RC3 will be the last pre-reset release. I'll make oversimplified but bugfix focused releases. Some of the non-crucial features (like Media Center Edition, Tablet PC Edition etc.) will be re-added in future post-reset builds. In the first post-reset release expect: Basic edition conversions like Pro -> Server, Server -> Home etc. Windows 2000 edition conversion. Setup patching for bypassing catalog errors. Limited AMD64 support. This release will focus on x86 conversions. Unattended mode. Features that will be added in later post-reset releases. Won't be included in first Post-Reset release: K/KN/N editions. Tablet PC Edition. Media Center Edition. FLPC Edition. Full AMD64 support. Custom Timebomb. Support for Whistler/.NET Server and Longhorn betas. Using Target Edition's installation key. Custom Catalog replacement. 3790-exclusive editions like Storage Server, Compute Server, Appliance Server and UDS Server. The working principle. 1. Extract both ISO files. 2. Copy all required files. 3. Combine INF sections of WinntDirectories, SourceDisksFiles and SourceDisksFiles.x86. Script will automatically remove all duplicate lines. 4. Remove unnecessary lines. Like Server-specific stuff on Professional. 5. Remove mentions of files that solely exist in Target ISO's DRIVER.CAB file. 6. Do required edits in .inf files like hivesys.inf. 7. Patch setup DLL files. 8. Create ISO. I haven't decided the version numbering yet. But it could be start from v5.0.0 to distinguish pre-reset releases.