Hi thank you all for the advice.

MIDI files:
I found two on the web that I could use as backing tracks, clicked on them and they played. However, i did not manage to download them by just clicking on them, or maybe they flew into a folder that i do not even know that I have???

Sources of Marlene Dietrich tracks - with vocals:
Yep, I got lots of those, but all in mono - good idea to look for cover versions, I just hope they did not all stick to Lili Marleen - which if I have to do it in English will be the D-day dodgers version.

Not too many songs:
Yes I totally agree, more than 3 or 4 would be too much, especially since I am new to this, will not be particularly good at this and holding an audience for more than 3 minutes will be quite a challenge for me. Still, wanna have some extras up my sleeve, the lads might be drunk and not mind me too much.

Not performing for the Nazis:
I so agree, but you see, these lads are reenacting the unwilling drafted men, not the ones who volunteered, they are all of the lardy fourtysomething-last-ditch-effort-lets-scrape-the-barrel-for-the- dregs-of-our-manhood-types who would much rather have stayed at home. My grandad was one of them and I think Marlene would not have minded that lot. Should some of those sicko SS guys from another society stroll past and linger, that is an entirely different matter altogether. I doubt that they would linger, most of them are soooo repressedly closet gay, I will prove to be far too much woman for them, all 13 1/2 stone of me. Anyway, if they do stop by they will be given three options: Leave, strip off those Nazi insignia or get stripped by my lads. The lads may be lardy but they are not tardy.

Thank you all again, if there are more helpful hints up your sleeves, keep them coming.

Cheers,
Ana