[quote=Corki] “addressing one another (in) psalms and hymns and spiritual songs, singing and playing to the Lord in your hearts,”
What version of the Scriptures are you reffering to? I’ve looked at several different versions, and find that most read “make melody in your heart” where you have “playing” (the Darby Bible translated “playing” as “chanting”). Of the approximately 20 different English versions I looked at (including the Douay-Rheims), not one uses the word “playing” (just looking for some clarification here, especially since you’re advising katrntogo that this is a valid argument).
I would suggest that you point out that musical instruments were used in the Temple worship (David had a lot of harps made for this purpose, and look at the dedication ceremony with Solomon - musical instruments all over the place!). Once she agrees that this is true, ask her to show you where the NT church abolished this practice (at least Corki was close on this one).
As far as the wine/grape juice question, I think SonCatcher summed it up nicely. There is no restriction in Scripture on the use of wine, EXCEPT when used in excess! I even had a doctor recommend that I have a glass of red wine with my supper to help my cholestrol (now if I can just get my benefits package to cover that, I’d be set!).
In regard to your friend trying to “save me from the evil of Catholicism”, as one who came out of Catholicism, I have a grerat deal of advice for you, but as it is off topic, I will not go into it here. My purpose is not so much to help you show her you (and the catholic church) are right, but to show her that her interpretation of the Scriptures is not correct (I can recommend some good web sites for her (and you) if you’re interested).