waiwiliki,
Here is one small bit of advice....
If you are creating custom thread "call outs" for your new .hol files, take your time getting the proper spaces and syntax in the call out section of the file. Pro/E must be restarted for the changes to take place-if you have made a mistake, it can be rather time consuming. I believe examples of "call out" syntax can be found through the Web link that Ben has mentioned above.
Best of luck
JW