Yes, besides its normal functions, PowerISO can create bootable CD/DVD using your files. To do this, click New > Data CD/DVD. Add the files using ADD+ then go to File > Image Properties and set it as ISO 9660.
After this procedure, go to Action > Boot > Add Boot Information. Select the BOOT image and add it to your CD/DVD. Once everything has been completed, go to Burn > Current Compilation and that's it.