Is there anyway to control the size of an ISO image when creating it from a CD without having to compress it? I'm trying to make a bootable ISO image.I'm using ImgBurn to make a win7 image from a CD
No. The iso format is uncompressed. If you want a smaller iso, put less data in the image.
For a Windows 7 image, there are some tools to reduce what components are included in the image such as nLite, which I have used to slipstream drivers, updates, and service packs into an image. The developer seems to have a more updated release called NTLite. A quick search has shown there are howto guides like on howtogeek that uses another tool I haven't used before. But if you want a standard image, possibly including some additional drivers, or more recent updates included, no the image will only be bigger.