Simple answer: Stop wasting your time with Flash. The world is abandoning it and any developer with any foresight will jump that ship right now - let alone teach yourself it! Adobe are gradually discontinuing Flash an shifting to HTML5/CSS3 - already Flash doesn't work on newer Android phones e.g. Galaxy S3 (basically, Jelly Bean).
I would suggest you start learning HTML5/CSS3 - the new(ish) standard though it's been around for a while now and is supported in all major browsers & IE9 (some bis are in IE8). Start here:
http://www.w3schools.com/html/html5_intro.asp
When you come to wanting to do slide shows, you have 2 options. Either go all out HTML5/CSS3 (and lose some browser support) by using CSS3 animations or go the JavaScript route in which case you're best to look at jQuery - by far the best/easiest. You can set up a slideshow less than 3 lines of code once you've learnt a little!
I realise this might be a bit of a learning curve with more to it before you reach doing slide shows, but it is certainly worth it! Especially if you are only just beginning with Flash (as it appears you are). No point teaching yourself an already outdated technology :)
Hope this helps,
Ed
Useful links:
HTML5:
http://www.w3schools.com/html/html5_intro.asp[
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CSS3:
http://www.w3schools.com/css3/default.asp[
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jQuery tutorial:
http://www.w3schools.com/jquery/default.asp[
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jQuery Website:
http://jquery.com[
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