What OS are you running? Win7 and above have built in support for mounting disc images. Just right click the image file and select mount.
This of course assumes you already created said images from your discs. If you haven't then you'll need to wait for your external drive to arrive and create images then (I like imgburn for that, and it's pretty straightforward) or you'll need to "sail the high seas" to obtain images.
-Mcoy
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