I really wouldn't recommend this. PowerPoint 95 is very old and as you've
discovered it doesn't share the same file format with PowerPoint 2003. In
fact there were three other version in between - - PowerPoint 97, 2000,
2002. You *can* save your presentation as "PowerPoint 97-2003 & 95
Presentation (*.PPT)" and she will be able to view it. However, there have
been so many changes that it is very likely that she won't see it the way
you created it. To improve the odds, go to Tools > Options > Edit and
disable the three items at the bottom. That way you'll basically be
creating a presentation with the features available in PowerPoint 97.
One thing that is often found in corrupt presentations is the fact that they
have been worked on in multiple versions of PowerPoint. For that reason I
recommend that you do a double save of your file so that you always have a
backup in case the master copy goes bonkers. You can use "Sequential Save"
which is a free add-in that'll make it easy.
http://www.mvps.org/skp/seqsave.htm