Same as what Bix said, but the longer version...
You need three main ingredients:
1. Cleaning supplies. Get a safe photo solution and slide-friendly cloth to clean the slides if they are dirty in any way. A scanner magnifies impurities at least 100-fold or more.
2. A good slide scanner. Those $100 or under jobs won't cut it -- they'll just give you a lousy blurry/off-color image. Good example of what not to buy is the VuPoint, PanDigital or FlashPoint slide and film scanner found at places like
Geeks ($30),
Walmart ($79) and
Adorama ($59). I have a professional Minolta USB slide scanner for sale for $200 if you're interested. Or I can help you look for something else, either way. Give budget of at least $100 or more. (Remember, you can re-sell it when you're done with the project!) Most acceptable scanners start at $200, and the better ones are in the $500+ range.
3. Slideshow software (or a slideshow creation method). Several programs have already been review here. For
reviews on DVD slideshow software, see
http://www.digitalfaq.com/forum/show...views-290.html -- and those are still accurate findings as of December (re-reviewed everything). Some good related reading here, too:
http://www.digitalfaq.com/forum/show...w-111-282.html
Outsourcing the scanning to a company is another idea. (We scan slides, FYI.)
If you're not wanting to make a slideshow DVD -- just wishing to place images on a data disc -- then remember to keep high resolution for at least a 4x6 or larger print. Forget all the "megapixels" BS, anything at ~3MP or above is going to be fine, if you're determined on counting the MP's.