Ok here is what I need.
For some reason I did not think this would be that complicated... I downloaded a copy of Goldwave and there are about 3 million controls on it that I have no idea what they are for.
And it seems that any search I do wants to give me programs to just join files together.

What I want is this.
I need to join together about an hours worth of music files into one big mp3 file...this is the easy part. I figured this out with Goldwave.

Now I need to insert a sound at time intervals. Say for example every minute a short (2 second) wav clip will be combined with the existing sound.
I will need to do a few different versions of this. Perhaps one tone at 20 seconds and another at 30.... repeating for the whole file.

Anyway, can Goldwave do this? If not something else...

thanks.