Hi Nathan
I believe the Match EQ has developed slightly since Logic 7... I don't have access to Logic 8... but at least in Logic 9 there are a couple more options... (as I say to everyone using Logic 9 - try right-clicking everywhere!)
Sounds like the easiest way for you to learn a source file is to drag the source file from the Finder onto the Template button. In Logic 9 you can right-click on the Template button. Does that work in Logic 8?
Here's an excerpt from the Logic 9 Studio Effects manual on three ways to use the Match EQ (p.126):
[i]To learn or create a Match EQ template
Do one of the following:
Drag an audio file from the finder onto the Template Learn button and select the source channel strip as a sidechain. See below.
Use the Match EQ on the source channel strip and save a setting. Import this setting into the target Match EQ instance.
To match the EQ of a project mix to the EQ of a source audio file
In the project you want to match to the source audio file, instantiate a Match EQ (typically on Output 1-2).
Drag the source audio file onto the Template Learn button.
Return to the start of your mix, click Current Material Learn, then play your mix (the current material) from start to finish.
When you are done, click Current Material Match (this automatically disengages the Current Material Learn button).
To use the matched EQ on a channel strip
Choose the channel strip that you want to match from the Sidechain menu of the Match EQ window.
Click the Template Learn button.
Play the entire source audio file from start to finish, then click the Template Learn button again (to stop the learn process).
Return to the start of your mix, click Current Material Learn, then play your mix (the current material) from start to finish.
When you are done, click Current Material Match (this automatically disengages the Current Material Learn button).[/i]
Hope this helps
Rounik