Andy,
I have done something similar and it should work.
Find your shared tcl library. For OpenACS its /web/opeancs/tcl
Under that create the packages subdirectory etc.
Under the modules section of your confile file setup a tcl module called packages like it says in the isntructions.
AOLserver should load anything under packages.
If you can, upgrade to 4.0 :) Its alot easier.