Hello Nadine,
I spend a lot of time in the Songwriting section as I find it rather exciting. Words and chords to a song you have never heard before and you can put you own 'stamp'on it.
The tempo, style of play and melody are what YOU choose it to be. Your version may be completely different you how the composer envisioned it but that is fine. I think playing these songs actually helps develop your own ability and who knows, a single phrase or chord sequence may even encourage you to write your own song.
By the way my version of "With You" is no longer on MySpace but e-mail me if you want me to send you a copy of it.
Take care,
Roger