Yeah, AOLserver looks through the private Tcl directory and reads each one alphabetically. I don't know anything about current versions of OpenACS or Classic ACS, but there used to be preloaded Tcl procs in files labeled like 00-ad-utilities.tcl and maybe zz-postproc.tcl. AOLserver doesn't really care about the name of the Tcl file, but if you have dependencies in your procs, be careful about how their arranged.
To be safe, put the original and/or previously modified versions of your Tcl files in a directory outside (e.g., tcl.orig and tcl.old) that's never sourced by AOLserver.
