Hi, I just started using unattended installing a few days ago. I've been able to integrate SP2, Office 2003, and several other applications into my unattended install. One thing that is slowing me down is the RunOnceEx, however. The batch commands I understand (and I think I am going to finish up a few apps with them for today and hopefully change later) but the RunOnceEx I am having trouble with. I've searched over and over (unfortunately there are a lot of posts related to RunOnceEx) but can not find a site/post that details exactly how to change a batch msiexec/.msi command to a RunOnceEx command. Examples are usually several lines long and I'd like to understand what I'm doing! Even the RunOnceEx file I have has thing in it I do not understand (such several commas in a row; what fields are those?). I've also seen many different formats for these commands. Is there a page (I don't care how complex/long/in-depth) that explains all of this in detail? Even a book would be fine. Every time I start searching on the web, I end up back at this site, and there are just little tidbits here and there, from what I can find. The site is great, but this one topic seems to be evasive. Thank you all, any help would be great. Windopain