let me ask you a question, what is the final goal ?
Are you doing prep work for someone to mix your songs in pro tools ?
If so you have a few options.
1- You can try creating 1 OMF project and send it. see if he/she accepts it and with positive results.
2- Sending the data (Audio tracks) making sure they all line up with a document attachment of the tempo changes, Track notes and details of the project.
I just cant understand why your moving the projects to a different platform (different DAW).
Maybe if I do understand I can give you a better idea of where to go from there.
I do a lot of different kind of work myself and as an engineer, I can tell you one thing, we hate receiving unorganized messes IE- 5 clips that go on track 1, 4 clips that go on track 2 and so on.
We also like it when every single track begins from the same spot. Midi tracks are a little different and can be over looked. Sometimes those will start on the second measure (2:01) and as long as its in the project notes given to the engineer, he wont have a problem with it.
There is a lot to be said of sending out a complete package. Many engineers, including myself will be more inclined to take a few dollars off of the over head price if there are no headaches involved. So this is what you want to achieve.
A Project Document: This includes a list of all the tracks. Any tempo changes should be noted in measures, if they are between a measure that should be noted as well. A list of problem areas, for example: a vocal section that has sibilance issues or a guitar part that has a buzz in one part.