Normal search from start menu.
Find files using Date tab. Select modified, choose your range of dates.
You can choose which type of files are searched for by using wildcards: *.ext1; *.ext2; *.ext3;... OK, more direct example: *.zip; *.mp3; *.txt; *.html; *.jpg
You can keep your list of filetypes in a text file, then copy/paste them in to the search box as needed.
Select files from the results window and drag them to your CD burning software's Add window.
There is also free search software out there that has more features and is more flexible. Try different ones out from download sites until you find the one you want. You're already a member of download.cnet.com if you're posting here. There's filehippo, softpedia, sourceforge....
Can't personally recommend a particular tool here, but the Windows method should work fine until you find something you like.
Have fun.