Hi! I had the same problem, both with BartPE and boss, and here's how I solved it after peering helplessly at the rather unhelpful help files for help. Include the "Startup groups" plugin in your build. This is our ticket. The help file says to put your autorun_1.cmd file in the %systemroot%\System32 directory, but doesn't tell you how to get it there. A test build showed that %systemroot% on the CD was named the same as the directory where my Windows install files resides. In my case this was C:\i386, so %systemroot% on the bootable CD became \i386. So I made a directory for inclusion in BartPE. Under this directory I made a directory tree \i386\System32, and put a file named autorun_1.cmd in System32. And it actually ran on boot. Well, it did after I remembered to include the directory in PEbuilder. "Can I go home now boss? No? Still more testing to do on the scripted install? Yes, boss, I'm on it..." Ah, well, you can't win. But you can definitely run a program when BartPE boots. Nils